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විකිපීඩියා වෙතින්
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This page guides the presentation of numbers, dates, times, measurements, currencies, coordinates, and similar material in articles. Its aim is to promote clarity and cohesion; this is especially important within an article. The goal is to make the whole encyclopedia easier and more intuitive to use.

Where this manual provides options, consistency should be maintained within an article unless there is a good reason to do otherwise. The Arbitration Committee has ruled that editors should not change an article from one guideline-defined style to another without a substantial reason unrelated to mere choice of style, and that revert-warring over optional styles is unacceptable.[1] If discussion cannot determine which style to use in an article, defer to the style used by the first major contributor.

General notes[සංස්කරණය]

Quotations, titles, etc.[සංස්කරණය]

Quotations, titles of books and articles, and similar "imported" text should be faithfully reproduced, even if they employ formats or units inconsistent with these guidelines or with other formats in the same article. If necessary, clarify via [bracketed interpolation], article text, or footnotes.

  • It is acceptable to change other date formats in the same article to provide consistency, so long as those changes would otherwise be acceptable.

Non-breaking spaces[සංස්කරණය]

Guidance on the use of non-breaking spaces ("hard spaces") – &nbsp;, {{nbsp}}, &thinsp;, {{thinsp}} – is given in some sections below; {{nowrap}} may also be useful in controlling linebreaks in some situations. Not all situations in which hard spaces or {{nowrap}} may be appropriate are described.

Chronological items[සංස්කරණය]

Statements likely to become outdated[සංස්කරණය]

කෙටි මග:
WP:DATED
WP:EPHEMERAL

Except on pages updated regularly (e.g. current events), terms such as now, currently, to date, so far, soon, and recently should usually be avoided in favor of phrases such as during the 1990s and in August 1969. For future and current events, use phrases such as as of ජනවාරි 2021 or since the beginning of 2010 to signal the time-dependence of the information. Or (for example) {{as of|2021}} will produce the text 2021 වන විට and adds the article to a category flagging it for periodic review. However, do not replace (for example) since the start of 2005 with {{as of|2005}} because some information (the start of 2005) would be lost; advanced features of {{as of}} such as {{as of|2005|alt=since the start of 2005}} can be used in such circumstances.

Relative-time expressions are acceptable for very long periods, such as geological epochs: Humans diverged from other primates long ago, but only recently developed state legislatures.

Time of day[සංස්කරණය]

කෙටි මග:
WP:MOSTIME
MOS:TIME

Context determines whether the 12- or 24-hour clock is used; in both, colons separate hours, minutes and seconds (e.g. 1:38:09 pm or 13:38:09).

  • 12-hour clock times end with dotted or undotted lower-case සැකිල්ල:Xtn or සැකිල්ල:Xtn, or සැකිල්ල:Xtn or සැකිල්ල:Xtn, preceded by a non-breaking space, e.g. 2:30 p.m. or 2:30 pm (markup: 2:30{{nbsp}}p.m. or 2:30{{nbsp}}pm), not 2:30p.m. or 2:30pm. Hours should not have a leading zero (e.g. 2:30 p.m., not 02:30 p.m.). Usually, use noon and midnight rather than 12 pm and 12 am; whether "midnight" refers to the start or the end of a date should be explicitly specified unless clear from the context.
  • 24-hour clock times have no a.m., p.m., noon or midnight suffix. Hours under 10 should have a leading zero (e.g. 08:15). The time 00:00 refers to midnight at the start of a date, 12:00 to noon, and 24:00 to midnight at the end of a date, but 24 should not be used for the first hour of the next day (e.g. use 00:10 for ten minutes after midnight, not 24:10).

The numerical elements of times-of-day are figures (12:45 p.m.) rather than words (twelve forty-five p.m.) though conventional terms such as noon and midnight are acceptable (taking care, with the latter, to avoid possible date ambiguity in constructions such as midnight on July 17).

Time zones[සංස්කරණය]

කෙටි මග:
WP:TIMEZONE

Give dates and times appropriate to the time zone where an event took place. For example, the date of the attack on Pearl Harbor should be December 7, 1941 (Hawaii time/​date). Give priority to the place at which the event had its most significant effects; for example, if a hacker based in China attacked a Pentagon computer in the US, use the time zone for the Pentagon, where the attack had its effect. In some cases the best solution may be to add the date and time in Coordinated Universal Time (UTC). For example:

  •   8 p.m. Eastern Standard Time on January 15, 2001 (01:00 UTC, January 16)

Alternatively, include just the UTC offset:

  •  21:00 British Summer Time (UTC+1) on 27 July 2012

Rarely, the time zone in which a historical event took place has since changed; for example, China to 1949 was divided into five time zones, whereas all of modern China is UTC+8. Similarly, the term "UTC" is not appropriate for dates before this system was adopted in 1960;[2] Universal Time (UT) is the appropriate term for the mean time at the prime meridian (Greenwich) when it is unnecessary to specify the precise definition of the time scale. Be sure to show the UTC or offset appropriate to the clock time in use at the time of the event, not the modern time zone, if they differ.

Dates, months and years[සංස්කරණය]

කෙටි මග:
MOS:DATEFORMAT

These requirements do not apply to dates in quotations or titles;

. Special rules apply to citations;

.

Formats[සංස්කරණය]

Acceptable date formats
General use Only where brevity is helpful (refs,[3] tables, infoboxes, etc.) Comments
2 August 2001 2 Aug 2001
August 2, 2001 Aug 2, 2001 A comma follows the year unless followed by other punctuation:[4] සැකිල්ල:Unordered list
2 August 2 Aug Omit year only where there is no risk of ambiguity: සැකිල්ල:Unordered list
August 2 Aug 2
No equivalent for general use 2001-08-02 Use yyyy-mm-dd format only with Gregorian dates from 1583 onward.[5]
Things to avoid[සංස්කරණය]
කෙටි මග:
MOS:UNLINKDATES
MOS:BADDATEFORMAT

Unacceptable date formats (except in external titles and quotes)
Acceptable Unacceptable Comments
9 June or June 9 9 june
june 9
Months are capitalized
9th June
June 9th
the 9th of June
Do not use ordinals (1st, 2nd, 3rd, etc.)
9. June Do not add a dot to the day
09 June
June 09
Do not "zero-pad" month or day, except in all-numeric (yyyy-mm-dd) format
2007-04-15 2007-4-15
2007/04/15 Do not use separators other than hyphen
07-04-15 Do not abbreviate year to two digits
15-04-2007
04-15-2007
Do not use dd-mm-yyyy, mm-dd-yyyy or yyyy-dd-mm formats, as they are ambiguous for some dates[8]
July 2001 7-2001
07-2001
2001-07
2001 July
July of 2001
Do not use these formats. (2001-07, in particular, can be mistaken for the range of years 2001 – 2007.)
July, 2001 No comma between month and year
3 July 2001 3 July, 2001
July 3, 2001 July 3 2001 Comma required between day and year
the 1997 elections the '97 elections
the 97 elections
Do not abbreviate freestanding year
Copyright 2002 Copyright MMII Roman numerals are not normally used for dates
2001 Two thousand one Years and days of the month are not normally written in words
May 1 or 1 May the first of May
May the first
June 622 June 0622 Do not zero-pad years
sold in 1995 sold in the year 1995 Use "in the year" only where needed for clarity (About 1800 ships arrived in the year 1801)
Consistency[සංස්කරණය]

කෙටි මග:
MOS:DATEUNIFY
  • Dates in article body text should all use the same format: She fell ill on 25 June 2005 and died on 28 June, but not She fell ill on 25 June 2005 and died on June 28.
  • Publication dates in an article's citations should all use the same format, which may be:
  • the format used in the article body text,
  • an abbreviated format from the "Acceptable date formats" table, provided the day and month elements are in the same order as in dates in the article body, or
  • the format expected in the citation style being used (however, all-numeric date formats other than yyyy-mm-dd must still be avoided).
For example, a single article might contain one, but only one, of:
Jones, J. (20 September 2008)
Jones, J. (September 20, 2008)
(among other possibilities).
  • Access and archive dates in an article's citations should all use the same format, which may be:
  • the format used for publication dates in the article;
  • the format expected in the citation style adopted in the article (e.g. 20 Sep 2008); or
  • yyyy-mm-dd
For example, a single article's citations might contain either of the following:
Jones, J. (20 Sep 2008) ... Retrieved 5 Feb 2009.
Jones, J. (20 Sep 2008) ... Retrieved 2009-02-05.
When a citation style does not expect differing date formats, it is permissible to normalize publication dates to the article body text date format, and/or access/archive dates to either, with date consistency being preferred.
Strong national ties to a topic[සංස්කරණය]
කෙටි මග:
MOS:DATETIES
  • Articles on topics with strong ties to a particular English-speaking country should generally use the date format most commonly used in that nation. For the United States this is, for example, July 4, 1976; for most other nations it is, for example, 4 July 1976.
  • Articles related to Canada may use either format with (as always) consistency within each article.
  • In some topic areas the customary format differs from the usual national one: for example, articles on the modern U.S. military use day-before-month, in accordance with U.S. military usage.
Retaining existing format[සංස්කරණය]
කෙටි මග:
MOS:DATERET
  • If an article has evolved using predominantly one format, the whole article should conform to it, unless there are reasons for changing it based on strong national ties to the topic or consensus on the article's talk page.
  • The date format chosen by the first major contributor in the early stages of an article should continue to be used, unless there is reason to change it based on strong national ties to the topic or consensus on the article's talk page.
  • Where an article has shown no clear sign of which format is used, the first person to insert a date is equivalent to "the first major contributor".

Era style[සංස්කරණය]

කෙටි මග:
WP:ERA
WP:BCE
  • The default calendar era is the Western Dionysian era system, a year numbering system also known as the Western Christian era (represented by BC and AD), or the Common Era (represented by BCE and CE).
    • සැකිල්ල:Xtn and සැකිල්ල:Xtn are the traditional ways of referring to this era. සැකිල්ල:Xtn and සැකිල්ල:Xtn are common in some scholarly texts and religious writings. Either convention may be appropriate.
      • Do not change the established era style in an article unless there are reasons specific to its content. Seek consensus on the talk page before making the change. Open the discussion under a subhead that uses the word "era". Briefly state why the style is inappropriate for the article in question. A personal or categorical preference for one era style over the other is not justification for making a change.
      • සැකිල්ල:Xtn and සැකිල්ල:Xtn or සැකිල්ල:Xtn and සැකිල්ල:Xtn are written in upper case, unspaced, without a period (full point, .), and separated from the year number by a space (5 BC, not 5BC). It is advisable to use a non-breaking space.
      • සැකිල්ල:Xtn may appear before or after a year (AD 106, 106 AD); the other abbreviations appear only after (106 CE, 3700 BCE, 3700 BC).
      • In general, do not use සැකිල්ල:Xtn or සැකිල්ල:Xtn unless required to avoid ambiguity (e.g. The Norman Conquest took place in 1066 not 1066 CE nor AD 1066) or awkwardness (January 1, 1 AD not January 1, 1). On the other hand, Plotinus was a philosopher living at the end of the 3rd century AD will avoid unnecessary confusion. Also, in He did not become king until 55 CE the era marker makes it clear that "55" does not refer to his age. Alternatively, He did not become king until the year 55.
      • Use either the BC – AD or the BCE – CE notation consistently within the same article. Exception: do not change direct quotations, titles, etc.
  • Uncalibrated (bce) radiocarbon dates: Some source materials will indicate whether a date is calibrated or not simply by a change in capitalisation; this is often a source of confusion for the unwary reader. Do not give uncalibrated radiocarbon dates (represented by the lower-case bce unit, occasionally සැකිල්ල:Xtn or සැකිල්ල:Xtn in some sources), except in directly quoted material, and even then include a footnote, a square-bracketed editor's note [like this], or other indication to the reader what the calibrated date is, or at least that the date is uncalibrated. Calibrated and uncalibrated dates can diverge surprisingly widely, and the average reader does not recognise the distinction between සැකිල්ල:Xtn and සැකිල්ල:Xtn or සැකිල්ල:Xtn.
  • BP: In scientific and academic contexts, BP (before present) is often used. This is calibrated from January 1, 1950, not from the date of publication, though the latter introduces an insignificant error when the date is distant or an approximation (18,000 BP). BP years are given as 18,000 BP or spelled out as 18,000 years before present (not 18,000 YBP, 18,000 before present, 18,000 years before the present, or similar). Do not convert other notations to or from BP unless you are certain of what you are doing. A safer and simpler alternative may be to use ya (years ago).
  • Other era systems may be appropriate in an article. In such cases, dates should be followed by a conversion to Dionysian (or vice versa) and the first instance should be linked: Qasr-al-Khalifa was built in 221 AH (836 CE), or in 836 AD (221 AH).
    • Astronomical year numbering follows the Common Era and does not require conversion, but the first instance of a non-positive year should still be linked: The March equinox passed into Pisces in year −67.

Julian and Gregorian calendars[සංස්කරණය]

කෙටි මග:
WP:OSNS
WP:JG

A date can be given in any appropriate calendar, as long as it is (at the minimum) given in the Julian calendar or the Gregorian calendar or both, as described below. For example, an article on the early history of Islam may give dates in both Islamic and Julian calendars. Where a calendar other than the Julian or Gregorian is used, the article must make this clear.

  • Current events are dated using the Gregorian calendar.
  • Dates of events in countries using the Gregorian calendar at that time are given in the Gregorian calendar. This includes some of the Continent of Europe from 1582, the British Empire from 14 September 1752, and Russia from 14 February 1918 .
  • Dates before 15 October 1582 (when the Gregorian calendar was first adopted in some places) are normally given in the Julian calendar. The Julian day and month should not be converted to the Gregorian calendar, but the start of the Julian year should be assumed to be 1 January .
  • Dates for Roman history before 45 BC are given in the Roman calendar, which was neither Julian nor Gregorian. When (rarely) the Julian equivalent is certain, it may be included.
  • For dates in early Egyptian and Mesopotamian history, Julian or Gregorian equivalents are often uncertain. Follow the consensus of reliable sources, or indicate their divergence.

The dating method used should follow that used by reliable secondary sources (or if reliable sources disagree, that used most commonly, with an explanatory footnote).

At some places and times, the new year began on a date other than 1 January. For example, in England and its colonies until 1752, the year began on Annunciation Day, 25 March;

. In writing about historical events, however, years should be assumed to have begun on 1 January

; if there is reason to use another start-of-year date, this should be noted.

If there is a need to mention Old or New Style dates in an article (as in the Glorious Revolution), a footnote should be provided on the first usage, stating whether the New Style refers to a start of year adjustment or to the Gregorian calendar (it can mean either).

Ranges[සංස්කරණය]

කෙටි මග:
MOS:DOB
WP:BORN
WP:OTHERDATE
WP:DATERANGE
  • A pure year – year range is written (as is any range) using an en dash (&ndash; or {{ndash}}) not a hyphen or slash; this dash is usually unspaced (that is, with no space on either side); and the range's end year is usually abbreviated to two digits:
  •   1881 – 86;  1881 – 92 (not 1881 – 6;  1881 – 86)
සැකිල්ල:Hanging indent
But both years are given in full in the following cases:
  • birth – death parentheticals: Petrarch (1304 – 1374) was ...;  not (1304 – 74)
  • different centuries: 1881 – 1903;  not 1881 – 03
  • starting year before 1000 AD: 355 – 372 (not 355 – 72);  95 – 113;  95 – 113 AD;  AD 95 – 113;  982 – 1066;  2590 – 2550 BCE;  1011 – 922 BC
Markup: 1011{{ndash}}922{{nbsp}}BC
  • spanning from BC/BCE to AD/CE: 42 BC – 15 AD (note spaced en dash)
සැකිල්ල:Hanging indent
Notes:
  • Periods straddling two different years, including sports seasons, are generally written with the range notation (2005 – 06). The slash notation (2005/06) may be used to signify a fiscal year or other special period, if that convention is used in reliable sources.
  • A date range may appear in 2005 – 2010 format if it is a range of sports seasons.[9] This format is also indicated for date ranges appearing in reference citations if any dates (of publication, access, archival) are in YYYY-MM-DD format, because the range in question could thus be easily mistaken for a yyyy-mm date: XYZ Annual Review, 2005 – 2006. Accessed 2013-04-07. but not XYZ Annual Review, 2005 – 06. Accessed 2013-04-07. Another case is in tables (and lists the items of which begin with date ranges) in which some but not all date ranges span a century (sortability of a date column in a table also requires a consistent format for all entries: 2005 – 07 will unintentionally sort before 2005 – 2006).
  • Other "pure" ranges use an unspaced en dash as well:
  • day – day: 5 – 7 January 1979;  January 5 – 7, 1979;  elections were held March 5 – 8
  • month – month: the 1940 peak period was May – July;  the peak period was May – July 1940;  (but the peak period was May 1940 – July 1940 uses a spaced en dash; )
  • If at least one of the items on either side of the en dash is in a mixed format (containing two or more of day, month, year); carries a modifier such as ආ.; or otherwise contains a space; then a spaced en dash ({{snd}}) is used:
  • between specific dates in different months: They travelled June 3 – August 18, 1952;  They travelled 3 June – 18 August 1952
  • between dates in different years:
Charles Robert Darwin (12 February 1809 – 19 April 1882) was an English naturalist ...
සැකිල්ල:Hanging indent
Abraham Lincoln (February 12, 1809 – April 15, 1865) was the 16th President of ...
  • between months in different years: The exception was in force August 1892 – January 1903;  The Ghent Incursion (March 1822 – January 1, 1823) was ended by the New Year's Treaty
සැකිල්ල:Hanging indent
  • For a person still living: Serena Williams (born September 26, 1981) is a ..., not (September 26, 1981 – ) or (born on September 26, 1981)
  • An overnight period may be expressed using a slash between two contiguous dates: the night raids of 30/31 May 1942 or raids of 31 May / 1 June 1942.
Or use an en dash: (unspaced) raids of 30 – 31 May 1942;  (spaced) raids of 31 May – 1 June 1942.
  • The {{Age}} template can keep ages current in infoboxes and so on:
  •  {{age|1989|7|23}} returns: 31
  •  {{age|1989|7|23}}-year-old returns: 31-year-old
  •  {{age|1989|7|23}} years old returns: 31 years old

Uncertain, incomplete, or approximate dates[සංස්කරණය]

  • To indicate "around", "approximately", or "about", the use of the spaced, unitalicised form c. 1291 (or the {{circa}} template) is preferred over circa, ca, ca., approximately, or approx.:
  •   At the birth of Roger Bacon (c. 1214) ...
  •   John Sayer (ආ. 1750 – 2 October 1818) ...
  •   the Igehalkid dynasty of Elam, ආ. 1400 BC ...
  • Where both endpoints of a range are approximate, c. should appear before each date:
  •   Dionysius Exiguus (ආ. 470 – ආ. 540) ... (not Dionysius Exiguus (ආ. 470 – 540) ...)
  •   Rameses III (reigned ආ. 1180 – ආ. 1150 BCE) ... (not Rameses III (reigned ආ. 1180 – 1150 BCE) ...)
  • Where birth/death dates have been extrapolated from known dates of activity:
  •   Offa of Mercia (before 734 – 26 July 796) ...
  •   Robert Menli Lyon (1789 – after 1863) ...
  •   Ambrose Gwinnett Bierce (June 24, 1842 – after December 26, 1913) ...
  • When a person is known to have been active ("flourishing") during certain years, fl., [[Floruit|fl.]], or {{fl.}} may be used:
  •   Osmund (සැකිල්ල:Fl.) ...
The linked forms should not be used on disambiguation pages, and "active" followed by the range is a better alternative for artists, soldiers and other persons with an occupation.
  • When a date is known to be either of two years (e.g. from a regnal or AH year conversion, or a known age at death):
  •   Anne Smith (born 1912 or 1913; died 2013) ...
  • Other forms of uncertainty should be expressed in words, either in article text or in a footnote: April 14, 1224 (unattested date). Do not use a question mark (1291?) for such purposes, as this fails to communicate the nature of the uncertainty.

Other[සංස්කරණය]

Days of the week[සංස්කරණය]

  • Days of the week are capitalized (Sunday, Wednesday).

Seasons[සංස්කරණය]

කෙටි මග:
WP:SEASON
MOS:SEASON
  • Seasons are uncapitalized (a hot summer) except when personified: Soon Spring will show her colors; Old Man Winter.
  • Using seasons to refer to a particular time of year (winter 1995) is ambiguous, because Northern and Southern Hemisphere seasons are six months out of phase, and many areas near the equator instead have wet and dry seasons. Consider alternative phrasing: early 1995;  the first quarter of 1995;  January to March 1995;   spent the southern summer in Antarctica.
  • However, using seasons is appropriate when referring to seasonal events: the autumn harvest;  migration typically begins in mid-spring.

Decades[සංස්කරණය]

කෙටි මග:
WP:DECADE
MOS:DECADE
  • To refer to a decade as a chronological period per se (not with reference to a social era or cultural phenomenon) always use four digits (the 1980s, but not the 1980's or the 1980සැකිල්ල:Nbhies, and definitely not the 1980s').
  • For a social era or cultural phenomenon associated with a particular decade:
  • Two digits (with a preceding apostrophe) may be used as an alternative to four digits, but only if this is a well-established phrase seen in reliable sources (the Roaring '20s,  the Gay '90s,  condemning the '60s counterculture, but grew up in 1960s Boston, moving to Dallas in 1971, and do not write the 90's;  the 90s;  or the 90s').
  • A third alternative (where seen in reliable sources) is to spell the decade out, capitalized: changing attitudes of the Sixties

Centuries and millennia[සංස්කරණය]

කෙටි මග:
WP:CENTURY
WP:MILLENNIUM
  • Treat the 1st century AD as years 1 – 100, the 17th century as 1601 – 1700, and the second millennium as 1001 – 2000; similarly, the 1st century BC/BCE was 100 – 1 BC/BCE, the 17th century was 1700 – 1601 BC/BCE, and the second millennium 2000 – 1001 BC/BCE.
    • The 18th century (1701 – 1800) and the 1700s (1700 – 1799) are not the same period.
    • When using forms such as the 1700s ensure there is no ambiguity as to whether e.g. 1700 – 1709 or 1700 – 1799, is meant.
    • Note that the sequence of years runs ... 2 BC, 1 BC, 1 AD, 2 AD ... – there is no "year 0".
  • Centuries and millennia are identified using either figures (the 18th century, not XVIII century) or words (the second millennium). When used adjectivally they contain a hyphen (nineteenth-century painting or 19th-century painting). Do not capitalize (the best Nineteenth-century paintings;  during the Nineteenth Century).

Long periods of time[සංස්කරණය]

Numbers[සංස්කරණය]

Numbers as figures or words[සංස්කරණය]

කෙටි මග:
WP:NUMERAL
MOS:NUMERAL
WP:SPELL09
MOS:SPELL09

Generally, in article text:

  • Integers from zero to nine are spelled out in words
  • Integers greater than nine expressible in one or two words may be expressed either in numerals or in words (16 or sixteen, 84 or eighty-four, 200 or two hundred). In spelling out numbers, components from 21 to 99 are hyphenated; larger ones are not (fifty-six, five hundred).
  • Other numbers are given in numerals (3.75, 544) or in forms such as 21 million. Markup: 21{{nbsp}}million
  • "billion" and "trillion" are understood to represent their short-scale values of 109 (1,000,000,000) and 1012 (1,000,000,000,000), respectively. Keep this in mind when translating articles from non-English Wikipedias, or using material from non-English sources.
  • M (unspaced) or bn (unspaced) respectively may be used for "million" or "billion" after a number, when the word has been spelled out at the first occurrence (e.g., She received £70 million and her son £10M).
  • SI prefixes and symbols, such as සැකිල්ල:Xtn (සැකිල්ල:Xtn) and සැකිල්ල:Xtn (සැකිල්ල:Xtn), should be restricted to use in scientific and engineering expressions.
  • Sometimes, the variety of English used in an article may necessitate the use of a numbering system other than the Western thousands-based system. For example, the South Asian numbering system is conventionally used in South Asian English. In those situations, link the first spelled-out instance of each quantity (e.g. [[crore]], which yields crore). (If no instances are spelled out, provide a note after the first instance directing the reader to the article about the numbering system.) Also, provide a conversion to Western numbers for the first instance of each quantity, and provide conversions for subsequent instances if they do not overwhelm the content of the article. For example, write three crore (thirty million). Group digits in Western thousands-based style (e.g., 30,000,000; not 3,00,00,000); . (Note that the variety of English does not uniquely determine the method of numbering in an article. Other considerations, such as conventions used in mathematics, science and engineering, may also apply, and the choice and order of formats and conversions is a matter of editorial discretion and consensus.)

කෙටි මග:
WP:NUMNOTES

Notes and exceptions:

  • In tables and infoboxes, quantities are expressed in figures (Years in office: 5); but numbers within a table's explanatory text and comments follow the general rule.
  • Numbers in mathematical formulae are never spelled out (3 < π < 22/7, not three < π < 22 sevenths).
  • Comparable quantities should be all spelled out or all in figures:
  •  five cats and thirty-two dogs, not five cats and 32 dogs.
  •  86 men and 103 women, not eighty-six men and 103 women
  •  There were 3 deaths and 206 injuries (even though "3" would normally be given as "three") or Three died and two hundred six were injured (or "two hundred and six" for British English, even though "two hundred six" would normally be given as "206"), not There were three deaths and 206 injuries.
  • But adjacent quantities not comparable should usually be in different formats: twelve 90-minute volumes or 12 ninety-minute volumes, not 12 90-minute volumes or twelve ninety-minute volumes.
  • Avoid awkward juxtapositions: On April 28, 2006, thirty-one more died., not On April 28, 2006, 31 more died.
  • Personal ages are typically stated in figures (8-year-old child) except for large, approximate values (69-million-year-old fossil).
  • Sometimes figures and words carry different meanings; for example Every locker except one was searched implies there is a single exception (we don't know which), while Every locker except 1 was searched means that only locker number 1 was not searched.
  • Proper names, technical terms, and the like are never altered: Seven Samurai;  The Sixth Sense;  5 Channel Street;  Channel 5;  Chanel No. 5;  Fourth Estate;  The Third Man;  Second Judicial District;  First Amendment;  Zero Hour!;  Less Than Zero
  • Avoid beginning a sentence with figures:
  •   Not There were many attacks. 23 men were killed, but There were many attacks; 23 men were killed or There were many attacks. Twenty-three men were killed.
  •   Not 1945 and 1950 saw crucial elections (nor Nineteen forty-five and 1950 saw crucial elections – because comparable numbers should be both written in words or both in figures) but The elections of 1945 and 1950 were crucial.
  • Exception: Where a proper name, technical term, etc., itself beginning with a numeral, opens the sentence (1-Naphthylamine is typically synthesized via the Feldenshlager – Glockenspiel process) although this can usually be avoided by rewording (Feldenshlager – Glockenspiel is the process typically used in the synthesis of 1-naphthylamine).
කෙටි මග:
MOS:ORDINAL
WP:ORDINAL

Ordinals[සංස්කරණය]

  • Ordinal suffixes suffixes (-st, -nd, -rd, -th) are not superscripted (123rd and 496th, not 123rd nor 496th).
  • Regnal numbers are normally written with roman numerals (without suffix, e.g. Elizabeth II not Elizabeth IInd).
  • Do not use a dot (.) or the ordinal mark (º) to indicate ordinals.

Fractions[සංස්කරණය]

කෙටි මග:
MOS:FRAC
  • Spelled-out fractions are hyphenated: seven-eighths.
  • Where numerator and denominator can each be expressed in one word, a fraction is usually spelled out (e.g. a two-thirds majority;  moved one-quarter mile); use figures if a fraction appears with a symbol (e.g. 14 mi – markup: {{frac}}&nbsp;mi, not a quarter of a mi or one-quarter mi).
  • Mixed numbers are usually given in figures, unspaced (not Fellini's film 8 12 or 8-​12 but Fellini's film 8 12 – markup: {{frac|8|1|2}}). In any case the integer and fractional parts should be consistent (not nine and 12).
  • Metric (SI) measurements generally use decimals, not fractions (5.25 mm, not 5​14 mm).
  • Non-metric (imperial and US customary) measurements may use fractions or decimals (5​14 inches; 5.25 inches); the practice of reliable sources should be followed, and within-article consistency is desirable.
  • In science and mathematics articles mixed numbers are rarely used (not 1​13 times the original voltage, but 4/3 the original) and use of {{frac}} is discouraged in favor of one of these styles:
  •    – markup: <math>\textstyle\frac{1}{2}</math>
  •   1/2 – markup: {{sfrac|2}}
  •   1/2 – markup: 1/2
  • Do not use special characters such as ½ (Deprecated markup: &frac12; or &#189;).
  • Ordinal suffixes such as සැකිල්ල:Xtn should not be used with fractions expressed in figures (not each US state has 1/50th of the Senate's votes, but one-fiftieth of the Senate's votes).
  • Nouns following simple fractions are singular (He took ​14 dose,  net change in score was −​12 point,  32 dose).
  • Nouns following mixed numbers are plural (suicide victim knew even 1​12 doses could be fatal,  vessel continued another 4​12 nautical miles).

Decimals[සංස්කරණය]

කෙටි මග:
WP:DECIMAL
MOS:DECIMAL
  • A period/full point (.), never a comma, is used as the decimal point (6.57, not 6,57).
  • Numbers between −1 and +1 require a leading zero (0.02, not .02); exceptions are sporting performance averages (.430 batting average) and commonly used terms such as .22 caliber.
  • Nouns following a number expressed as a decimal are plural (averaging 0.7 years).
  • Indicate repeating digits with an overbar e.g. 14.31{{overline|28}} gives 14.3128. (Consider explaining this notation on first use.) Do not write e.g. 14.31(28) because it resembles notations for § Uncertainty.

Grouping of digits[සංස්කරණය]

කෙටි මග:
WP:DIGITS
MOS:DIGITS
  • Digits should be grouped and separated either by commas or narrow gaps (never a period/full point).
Grouping with commas
  • Left of the decimal point, five or more digits are grouped into threes separated by commas (e.g.  12,200,  255,200 km,  8,274,527th,  186,400).
  • Numbers with exactly four digits left of the decimal point may optionally be grouped (either  1,250  or  1250), provided that this is consistent within each article.
  • When commas are used left of the decimal point, digits right of the decimal point are not grouped (i.e. should be given as an unbroken string).
  • Markup: {{formatnum:}} produces this formatting.
Grouping with narrow gaps
  • Digits are grouped both sides of the decimal point (e.g.  6543210.123456,  520.01234 °C,  101325/760).
  • Digits are generally grouped into threes. Right of the decimal point, usual practice is to have a final group of four instead of a lone digit (e.g.  99.1234567  or  99.1234567). In mathematics-oriented articles long strings may be grouped into fives (e.g.  3.14159265358979323846...).
  • This style is especially recommended for articles related to science, technology, engineering or mathematics.
  • Markup: Templates {{val}} or {{gaps}} may be used to produce this formatting. Note that use of any space character in numbers, including non-breaking space, is problematic for screen readers. Screen readers read out each group of digits as separate numbers (e.g.  30&thinsp;000  is read as "thirty zero zero zero".)
  • Delimiting style should be consistent throughout a given article.
  • Either use commas or narrow gaps, but not both in the same article.
  • Either group the thousands in a four-digit number or do not, but not mixed use in the same article.
  • However, grouping by threes and fives may coexist.
  • An exception is made for four-digit page numbers or four-digit calendar years. These should never be grouped (not  sailed in 1,492,  though  dynasty collapsed around 10,400 BC  or  by 13727 AD, the Earth's axial precession will have made Vega the northern pole star).

Percentages[සංස්කරණය]

කෙටි මග:
MOS:PERCENT
WP:PERCENT
WP:%
  • In the body of non-scientific/non-technical articles, සැකිල්ල:Xtn (American English) or සැකිල්ල:Xtn (British English) are commonly used: 10 percent; ten percent; 4.5 per cent. Ranges are written ten to twelve per cent or ten to twelve percent, not ten – twelve per cent or ten to twelve %.
  • In the body of scientific/​technical articles, and in tables and infoboxes of any article, the symbol % (unspaced) is more common: 71%, not 71 % or three %. Ranges: 10 – 12%, not 10% – 12% or 10 to 12%.
  • When expressing the difference between two percentages, do not confuse a percentage change with a change in percentage points.

Scientific and engineering notation[සංස්කරණය]

  • Scientific notation always has a single nonzero digit to the left of the point: not 60.22×1022, but 6.022×1023.
  • Engineering notation is similar, but adjusted so that the exponent is a multiple of three: 602.2×1021.
  • Avoid mixing scientific and engineering notations (A 2.23×102 m2 region covered by 234.0×106 grains of sand).
  • In a table column (or other presentation) in which all values can be expressed with a single power of 10, consider giving e.g. ×107 once in the column header, and omitting it in the individual entries. (Markup: {{e|7}})
  • In both notations, the number of digits indicates the precision. For example, 5×103 means rounded to the nearest thousand; 5.0×103 to the nearest hundred; 5.00×103 to the nearest ten; and 5.000×103 to the nearest unit.

Markup: {{val}} and {{e}} may be used to format exponential notation.

Uncertainty and rounding [සංස්කරණය]

කෙටි මග:
MOS:UNCERTAINTY
MOS:LARGENUM
  • Where explicit uncertainty information (such as a margin of error) is available and appropriate for inclusion, it may be written in various ways:
  •  (1.534 ± 0.035) × 1023 m
  •  12.34 m2 ± 5% (not used with scientific notation)
  •  15.34 +0.43−0.23 × 1023 m
  •  1.604(48) × 10−4 J (equivalent to (1.604 ± 0.048) × 10−4 J)[10]
  •  Polls estimated Jones's share of the vote would be 55%, give or take about 3%
Markup: {{+-}}, {{su}}, and {{val}} may be used to format uncertainties.
  • Where explicit uncertainty is unavailable (or is unimportant for the article's purposes) round to an appropriate number of significant digits; the precision presented should usually be conservative. Precise values (often given in sources for formal or matter-of-record reasons) should be used only where stable and appropriate to the context, or significant in themselves for some special reason.
  •   The speed of light is defined to be 299,792,458 m/s
but Particle velocities eventually reached almost two-thirds the 300-million-metre-per-second speed of light
  •   The city's 1920 population was 667,000 (not population was 666,666 – an official figure unlikely to be accurate at full precision)
but The town was ineligible because its official census figure (9,996) fell short of the statutory minimum of ten thousand (unusual case in which the full-precision official population figure is helpful to readers)
  •   The accident killed 337 passengers and crew, and three airport workers (likely that accurate and precise figures were determined)
  •   At least 800 persons died in the ensuing mudslides (unlikely that any precise number can be accurate, even if an official figure is issued)
or Officials listed 835 deaths, but the Red Cross said dozens more may have gone unreported (in reporting conflicting information, give detail sufficient to make the contrast intelligible)
  •   The jury's award was $8.5 million ... (where the actual figure was $8,462,247.63) ... – reduced on appeal to $3,000,001 (one dollar in actual damages, the remainder in punitive damages)
  • The number of decimal places should be consistent within a list or context (The response rates were 41.0 and 47.4 percent, respectively, not 41 and 47.4 percent), unless different precisions are actually intended.
  • It may sometimes be appropriate to note the lack of uncertainty information, especially where such information is normally provided and necessary for full interpretation of the figures supplied.
  •   A local newspaper poll predicted 52% of the vote would go to Smith, but did not publish information on the uncertainty of this estimate
  • The {{undue precision}} template may be added to figures appearing to be overprecise.
  • Avoid using "approximately", "about", and similar terms with figures that have merely been approximated or rounded in a normal and expected way, unless the reader might otherwise be misled.
  •   The tallest player was 6 feet 3 inches (not ... about 6 feet 3 inches – heights are conventionally reported only to the nearest inch, even though greater precision may be available in principle)
but The witness said the assailant was about 5 feet 8 inches tall ("about" because here the precise value is unknown, with substantial uncertainty)
  • The reader may be assumed to interpret large round numbers (100,000 troops) as approximations. Writing a quantity in words (one hundred thousand troops) can further emphasize its approximate nature.

Non-base-10 notations[සංස්කරණය]

කෙටි මග:
MOS:BASE
MOS:RADIX
MOS:BINARY
MOS:HEX
  • In computer-related articles, use the C programming language prefixes 0x (zero-ex) for hexadecimal and 0 (zero) for octal. For binary, use 0b. Explain these prefixes in the article's introduction or on first use.
  • In all other articles, use <sub> to create subscripts: 1379, 2413. Markup: 137<sub>9</sub>, 241<sub>3</sub>
  • For bases above 10, use symbols conventional for that base (as seen in reliable sources) e.g. for base 16 use 0 – 9A – F.

Units of measurement[සංස්කරණය]

කෙටි මග:
WP:UNIT
WP:UNITS
WP:METRIC
WP:MEASUREMENT

Unit choice and order[සංස්කරණය]

Quantities are typically expressed using an appropriate "primary unit", displayed first, followed, when appropriate, by a conversion in parentheses e.g. 200 කිලෝමීටර (120 mi). For details on when and how to provide a conversion, see the section § Unit conversions. The choice of primary units depends on the circumstances, and should respect the principle of "strong national ties", where applicable:

  • In non-scientific articles relating to the United States, the primary units are US customary, e.g. 97 pounds (44 kg).
  • In non-scientific articles relating to the United Kingdom, the primary units for most quantities are metric or other internationally used units,[11] except that:
    • UK engineering-related articles, including those on bridges and tunnels, generally use the system of units that the topic was drawn up in (but road distances are given in imperial units, with a metric conversion – see next bullet);
    • the primary units for distance/​length, speed and fuel consumption are miles, miles per hour, and miles per imperial gallon (except for short distances or lengths, where miles are too large for practical use);
    • the primary units for personal height and weight are feet​/inches and stones/​pounds;
    • imperial pints are used for quantities of draught beer/​cider and bottled milk;
  • In all other articles, the primary units chosen will be SI units, non-SI units officially accepted for use with the SI, or such other units as are conventional in reliable-source discussions of the article topic (such as revolutions per minute (rpm) for angular speed, hands for heights of horses, et cetera).

Special considerations:

  • Quantities set via definition (as opposed to measured quantities) should be given first in the units used in the definition, even if this makes the structure of presentation inconsistent: During metrification, the speed limit was changed from 30 miles per hour (48 kilometers per hour) to 50 km/h (31 mph).
    • This may benefit from a slightly non-standard structure, such as ...from 30 miles per hour (about 48 kilometers per hour) to 50 km/h (about 31 mph). In this sort of case, using සැකිල්ල:Xtn can help make clear which is the statutory, exact value.
  • Nominal quantities (e.g. 2 × 4 lumber) require consideration of whether the article is concerned with the item's actual dimensions or merely with its function. In some cases only the nominal quantity may suffice; in others it may be necessary to give the nominal size (often in non-SI units), the actual size in non-SI units, and the actual size in SI units.
  • Whenever a conversion is used, ensure that the precision of the converted quantity in the article is comparable to the precision of the value given by the source .
  • Where the article's primary units differ from the units given in the source, the {{convert}} template's |order=flip flag can be used; this causes the original unit to be shown as secondary in the article, and the converted unit to be shown as primary: {{convert|200|mi|km|order=flip}}The two cities are 320 කිලෝමීටර (200 mi) apart.

Unit names and symbols[සංස්කරණය]

Definitions:
  • Examples of unit names: foot, meter, kilometer.
  • Examples of unit symbols: ft, m, km.
  • Unit names and symbols should follow the practice of reliable sources.
  • In prose, unit names should be given in full if used only a few times, but symbols may be used when a unit (especially one with a long name) is used repeatedly, after spelling out the first use (e.g. Up to 15 kilograms of filler is used for a batch of 250 kg).
  • Certain unit names (e.g. °C) need never be written in full unless required stylistically (automatic conversion of degrees Celsius to degrees Fahrenheit).
  • Where space is limited, such as in tables, infoboxes, parenthetical notes, and mathematical formulas, unit symbols are preferred.
  • Units unfamiliar to general readers should be presented as a name – symbol pair on first use, linking the unit name (Energies were originally 2.3 megaelectronvolts (MeV), but were eventually 6 MeV).
  • Ranges use unspaced en dash ({{ndash}}) if only one unit symbol is used at the end (e.g. 5.9 – 6.3 kg), and spaced en dash ({{snd}}) if two symbols are used (e.g. 3 μm – 1 mm); ranges in prose may be specified using either unit symbol or unit names, and units may be stated either after both numerical values or after the last (e.g. from 5.9 to 6.3 kilograms, from 5.9 kilograms to 6.3 kilograms, from 5.9 to 6.3 kg and from 5.9 kg to 6.3 kg are all acceptable).
  • Length – width, length – width – height and similar dimensions may be separated by the multiplication sign (×}}) or the word සැකිල්ල:Xtn.
    • With the multiplication sign, each number should be followed by a unit name or symbol (if appropriate):
  •  1 m × 3 m × 6 m, not 1 × 3 × 6 m , (1 × 3 × 6) m nor 1 × 3 × 6 m3
  •  a metal plate 1 ft × 3 ft × 0.25 in
  •  a railroad easement 10 ft × 2.5 mi
  • With සැකිල්ල:Xtn, the unit need be given only once: 1 by 3 by 6 metres or 1 by 3 by 6 m
  • The unspaced letter x may be used in common terms such as 4x4.
General guidelines on unit names and symbols
Aspect Guideline Acceptable Unacceptable
Spelling The spelling of certain unit names (some of which are listed in § Specific units, below) varies with the variety of English followed by the article.
Format Do not spell out numbers before unit symbols ... 5 min five min
... but words or numerals may be used with unit names.
  • five minutes
  • 5 minutes
Values not accompanied by units are usually given in figures. Set the control to 10. Set the control to ten.
Write unit names and symbols in upright (roman) type, except where emphasizing in-context. 10 m 10 m
29 kilograms 29 kilograms
Therefore, each two-liter jug contained only two quarts.
Unit names are given in lower case except: in places where any word would be capital­ized; where otherwise specified in the SI brochure;[12] where otherwise specified in this Manual of Style.[පැහැදීම ඇවැසිය]
  • He walked several miles.
  • Miles of trenches were dug.
A Gallon equals 4 Quarts.
Except as listed in the "Specific units" table below, unit symbols are uncapi­tal­ized unless they are derived from a proper name, in which case the first letter (of the base unit symbol, not of any prefix) is capitalized.[13] 8 kg 8 Kg
100 kPa 100 kpa
Unit symbols are undotted. 38 cm 38 cm.
Except as shown in the "Specific units" table below, a space appears between a numeric value and a unit name or symbol. In the case of unit symbols, &nbsp; (or {{nowrap}}සැකිල්ල:Px1) should be used to prevent linebreak. 29 kg
Markup: 29&nbsp;kg
29kg
To form a value and a unit name into a compound adjective use a hyphen or hyphens ...
  • a five-day holiday
  • a five-cubic-foot box
  • a 10-centimeter blade
... but a non-breaking space (never hyphen) separates a value and unit symbol.
  • a blade 10 cm long
a 10-cm blade
Plurals SI unit names are pluralized by adding the appropriate -s or -es suffix ... 1 ohm, 10 ohms
... except for these irregular forms. 1 henry, 10 henries 10 henrys
1 hertz, 10 hertz 10 hertzes
1 lux, 10 lux 10 luxes
1 siemens, 10 siemens
Some non-SI units have irregular plurals. 1 foot, 10 feet 10 foots
1 stratum, 10 strata (unusual) 10 stratums
Unit symbols (in any system) are identical in singular and plural.
  • grew from 1 in to 2 in
  • grew from 1 inch to 2 inches
  • grew from one to two inches
grew from 1 in to 2 ins
Powers Format exponents using <sup>...</sup>, not special characters. km2
Markup: km<sup>2</sup>
Deprecated markup: km&#178;
Or use සැකිල්ල:Xtn or සැකිල්ල:Xtn (after the unit being modified). ten metres per second squared ten metres per squared second
For areas or volumes only, සැකිල්ල:Xtn or සැකිල්ල:Xtn may be used (before the unit being modified). ten metres per square second
tons per square mile
සැකිල්ල:Xtn or සැකිල්ල:Xtn may be used with US customary or imperial units, but not with SI units. 15 sq mi 15 sq km
3 cu ft 3 cu m
Products Indicate a product of unit names with either a hyphen or a space.
  • foot-pound
  • foot pound
  • footpound
  • foot·pound
Indicate a product of unit symbols with &middot; or &nbsp; (Note: {{middot}} is not equivalent to &middot;.)
  • ms = millisecond
  • m·s or m s = metre-second
Exception: In some topic areas such as power engineer­ing, certain products take neither space nor &middot;. Follow the practice of reliable sources in the article's topic area.
To pluralize a product of unit names, pluralize only the final unit. (Unit symbols are never pluralized.) ten foot-pounds ten feet-pounds
Ratios,
Rates,
Densities
Indicate a ratio of unit names with සැකිල්ල:Xtn. meter per second meter/second
Indicate a ratio of unit symbols with a forward slash (/), followed by either a single symbol or a parenthesized product of symbols – do not use multiple slashes; or use −1, −2, etc.
  • metre per second
  • m/s
  • m·s−1
  • mps
  • kg/(m·s)
  • kg·m−1·s−1
  • kg/m·s
  • kg/m/s
To pluralize a ratio of unit names, pluralize only the numerator unit. (Unit symbols are never pluralized.)
  • ten newton-metres per second
  • 10 N·m/s
Some of the special forms used in the imperial and US customary systems are shown here ...
  • mph = miles per hour
  • mpg = miles per gallon
  • psi = pounds per square inch
... but only the slash or negative exponent notations are used with SI (and other metric) units.
  • g/m2
  • g·m−2
gsm
  • km/h
  • km·h−1
kph
Prefixes Prefixes should not be separated by a space or hyphen. 25 kilopascals
  • 25 kilo pascals
  • 25 kilo-pascals
Prefixes are added without contraction, except as shown here: kilohm kiloohm
megohm megaohm
hectare hectoare
The සැකිල්ල:Xtn, සැකිල්ල:Xtn, සැකිල්ල:Xtn, and සැකිල්ල:Xtn prefixes should generally be avoided; exceptions include centimetre, decibel, hectolitre, hectare, and hectopascal.
  • 100 metres
  • 0.1 km
1 hectometre
Do not use M for 103, MM for 106, or B for 109 (except as noted elsewhere on this page for සැකිල්ල:Xtn and සැකිල්ල:Xtn, e.g. for monetary values) 3 km 3 Mm
8 MW 8 MMW
125 GeV 125 BeV
Mixed
units
Mixed units are traditionally used with the imperial and US customary systems 
  • 1 ft 6 in
  • 1 foot 6 inches
  • 1.5 ft
  • 18 in
  • 1 US fl pt 8 oz
  • 1 US fl pt 8 US fl oz
... and in expressing time durations ...
  • 1 h 30 min 7 s
  • 1 hr 30 m 7 sec
  • 1:30′07″
… but are not normally used in SI.
  • 1.33 m
  • 133 cm
1 m 33 cm
No comma. 6 lb 3 oz 6 lb, 3 oz

Note to table:

  1. Only use this format if it is clear from the context whether this means hours and minutes (H:MM) or minutes and seconds (M:SS).

Specific units[සංස්කරණය]

  • The following table lists only units that need special attention.
  • The SI Brochureඋපුටාදැක්වීම් දෝෂය: <ref> ටැගය සොයාගත නොහැකි බැවින් </ref> වසා දමමින් recommend සැකිල්ල:Xtn.

|- | mile | mi |rowspan=3 | In nautical and aeronautical contexts use statute mile rather than mile to avoid confusion with nautical mile. |- | mile per hour | mph |- | nautical mile | nmi or NM (not nm) |- | rowspan = 13 | Volume,
Flow

| rowspan = 2 |

  • cubic centimetre
  • cubic centimeter (U.S.)

| cm3 | Markup: cm<sup>3</sup> |- | cc | Non-SI symbol used for certain engine displacements; link to Cubic centimeter on first use. |- | imperial fluid ounce | imp fl oz | rowspan=8 | සැකිල්ල:Xtn or සැකිල්ල:Xtn (or සැකිල්ල:Xtn) must be specified; සැකිල්ල:Xtn or සැකිල්ල:Xtn must be specified, except with  gallon. (Without සැකිල්ල:Xtn, ounce is ambiguous – versus avoirdupois ounce or troy ounce – and pint or quart is ambiguous – versus US dry pint or US dry quart.) |- | imperial fluid pint | imp fl pt |- | imperial fluid quart | imp fl qt |- | imperial gallon | imp gal |- | US fluid ounce | US fl oz |- | US fluid pint | US fl pt |- | US fluid quart | US fl qt |- | US gallon | US gal |- | cubic foot | cu ft (not cf) | Write five million cubic feet, 5,000,000 cu ft or 5×106 cu ft, not 5 MCF. |- | cubic foot per second | cu ft/s (not cfs) | |-

|

  • litre
  • liter (U.S.)

| l or L | The symbol l in isolation (i.e. not in such forms as ml) is easily mistaken for the digit 1 or the capital letter I. |- | rowspan=7 | Mass,
Force,
Density,
Pressure | long ton | long ton | rowspan=2 | Spell out in full. |- | short ton | short ton |- | pound per square inch | psi | |-

|

| t (not mt or MT) | |- | troy ounce | oz t | rowspan=2 | සැකිල්ල:Xtn or සැකිල්ල:Xtn must be specified. Articles about precious metals, black powder, and gemstones should always specify whether ounces and pounds are avoirdupois or troy. |- | troy pound | lb t |- | carat | carat | Used to express masses of gemstones and pearls. |- | Purity | carat or karat | k or Kt | A measure of purity for gold alloys. (Do not confuse with the unit of mass with the same spelling.) |- | rowspan=5 | Time | second | s |rowspan=3|Do not use &prime; (), &Prime; (), apostrophe (') or quote (") for minutes or seconds. Use සැකිල්ල:Xtn for "minute" only where there is no danger of confusion with meter, as in the hours – minutes – seconds formats for time durations described in the Unit names and symbols table. |- | minute | min |- | hour | h |- | rowspan=2|year | a | Use සැකිල්ල:Xtn only with an SI prefix mulitplier (a rock formation 540 Ma old, not Life expectancy rose to 60 a). |- | y or yr

|

|- | rowspan=4 | Informa­tion,
Data | bit | bit (not b or B)

| rowspan=4 |

|- | byte | B or byte (not b or o) |- | bit per second | bit/s (not bps or b/s) |- | byte per second | B/s or byte/s (not Bps or Bps) |- | rowspan = 4 | Angle |- | arcminute | | Prime: ′. Markup: &prime;  (not apostrophe/​single quote '). No space between numerals and symbol (47′, not 47 ) |- | arcsecond | | Double prime: ″. Markup: &Prime;  (not double-quote "). No space between numerals and symbol (22″, not 22 ) |- | degree | ° | Markup: &deg;  (not masculine ordinal º or ring සැකිල්ල:Thinsp̊සැකිල්ල:Thinsp). No space between numerals and symbol (23°, not 23 °) |- | rowspan = 2 | Temperature | degree | ° | rowspan = 2 | Markup: &deg;. Nonbreaking space ({{nbsp}}) between numerals and symbol (40 °, not 40°; 12 °C, not 12°C, nor 12° C) |- | degree Celsius (not degree centigrade) | °C (not C) |- | rowspan = 2 | Energy

|

| cal | rowspan=2 | In certain subject areas, calorie is convention­ally used alone. Articles following this practice should specify on first use whether the use refers to the small calorie or to the kilocalorie (large calorie). Providing conversions to SI units (usually calories to joules or kilocalories to kilojoules) may also be useful. A kilocalorie (kcal) is 1000 calories. A calorie (small calorie) is the amount of energy required to heat 1 gram of water by 1 °C. A kilocalorie is therefore also a kilogram calorie. |-

|

  • kilocalorie
  • large calorie
  • kilogram calorie
  • (not Calorie – can be ambiguous)

| kcal |}

Quantities of bytes and bits [සංස්කරණය]

කෙටි මග:
WP:COMPUNITS

In quantities of bits and bytes, the prefixes සැකිල්ල:Xtn (symbol සැකිල්ල:Xtn or සැකිල්ල:Xtn), සැකිල්ල:Xtn (සැකිල්ල:Xtn), සැකිල්ල:Xtn (සැකිල්ල:Xtn), සැකිල්ල:Xtn (සැකිල්ල:Xtn), etc., are ambiguous. They may be based on a decimal system (like the standard SI prefixes), meaning 103, 106, 109, 1012, etc., or they may be based on a binary system, meaning 210, 220, 230, 240, etc. The binary meanings are more commonly used in relation to solid-state memory (such as RAM), while the decimal meanings are more common for data transmission rates, disk storage and in theoretical calculations in modern academic textbooks. සැකිල්ල:Bit and byte prefixes Follow these recommendations when using these prefixes in Wikipedia articles:

  • Following the SI standard, a lower-case k should be used for "kilo-" whenever it means 1000 in computing contexts, whereas a capital K should be used instead to indicate the binary prefix for 1024 according to JEDEC. (If, under the exceptions detailed further below, the article otherwise uses IEC prefixes for binary units, use Ki instead).
  • Do not assume that the binary or decimal meaning of prefixes will be obvious to everyone. Explicitly specify the meaning of k and K as well as the primary meaning of M, G, T, etc. in an article ({{BDprefix}} is a convenient helper). Consistency within each article is desirable, but the need for consistency may be balanced with other considerations.
  • The definition most relevant to the article should be chosen as primary for that article, e.g. specify a binary definition in an article on RAM, decimal definition in an article on hard drives, bit rates, and a binary definition for Windows file sizes, despite files usually being stored on hard drives.
  • Where consistency is not possible, specify wherever there is a deviation from the primary definition.
  • Disambiguation should be shown in bytes or bits, with clear indication of whether in binary or decimal base. There is no preference in the way to indicate the number of bytes and bits, but the notation style should be consistent within an article. Acceptable examples include:
  •  A 64 MB (64 × 10242-byte) video card and a 100 GB (100 × 10003-byte) hard drive
  •  A 64 MB (64 × 220-byte) video card and a 100 GB (100 × 109-byte) hard drive
  •  A 64 MB (67,108,864-byte) video card and a 100 GB (100,000,000,000-byte) hard drive
  • Avoid inconsistent combinations such as A 64 MB (67,108,864-byte) video card and a 100 GB (100 × 10003-byte) hard drive. Footnotes, such as those seen in Power Macintosh 5500, may be used for disambiguation.
  • Unless explicitly stated otherwise, one byte is eight bits .

The IEC prefixes සැකිල්ල:Xtn (symbol සැකිල්ල:Xtn), සැකිල්ල:Xtn (සැකිල්ල:Xtn), සැකිල්ල:Xtn (සැකිල්ල:Xtn), etc., are generally not to be used except:[14]

  • when the majority of cited sources on the article topic use IEC prefixes;
  • in a direct quote using the IEC prefixes;
  • when explicitly discussing the IEC prefixes; or
  • in articles in which both types of prefix are used with neither clearly primary, or in which converting all quantities to one or the other type would be misleading or lose necessary precision, or declaring the actual meaning of a unit on each use would be impractical.

Unit conversions[සංස්කරණය]

කෙටි මග:
MOS:CONVERSIONS
WP:MOSCONVERSIONS

Where English-speaking countries use different units for the same quantity, follow the "primary" quantity with a conversion in parentheses: the Mississippi River is 2,320 සැතපුම්s (3,734 km) long; the Murray River is 2,375 කිලෝමීටර (1,476 mi) long. In science-related articles, however, supplying such conversion is not required unless there is some special reason to do so.

  • Where an imperial unit is not part of the US customary system, or vice-versa – and in particular, where those systems give a single term different definitions – a double conversion may be appropriate: Rosie weighed 80 කිලෝgrams (180 lb; 12 st 8 lb) (markup: {{convert|80|kg|lb stlb}}); The car had a fuel economy of 5 L/100 km (47 mpg‑US; 56 mpg‑imp) (markup: {{convert|5|L/100km|mpgus mpgimp|abbr=on}}).
  • Generally, conversions to and from metric units and US or imperial units should be provided, except:
    • When inserting a conversion would make a common or linked expression awkward (The four-minute mile).
    • When units are part of the subject of a topic – nautical miles in articles about the history of nautical law (5 nautical miles), SI units in scientific articles (a 600-kilometer asteroid), yards in articles about American football – it can be excessive to provide conversions every time a unit occurs. It could be best to note that this topic will use the units (possibly giving the conversion factor to another familiar unit in a parenthetical note or a footnote), and link the first occurrence of each unit but not give a conversion every time it occurs.
  • Converted quantity values should use a level of precision similar to that of the source quantity value, so the Moon is 380,000 kilometres (240,000 mi) from Earth, not (236,121 mi). Small numbers may need to be converted to a range where rounding would cause a significant distortion, so one mile (1–2 km), not one mile (2 km). Be careful especially when your source has already converted from the units you're now converting back to. This may be evidenced by multiples of common conversion factors in the data, such as 160 km (from 100 miles).
  • Conversion templates can be used to convert and format many common units, including {{convert}}, which includes non-breaking spaces.
  • In a direct quotation, always retain the source units. Any conversions can be supplied either in the quote itself (in square brackets, following the original measurement) or in a footnote.
  • {{Units attention}} may be added to articles needing general attention regarding choice of units and unit conversions.

Currencies and monetary values[සංස්කරණය]

කෙටි මග:
WP:$
WP:£
WP:€
MOS:CURRENCY

Choice of currency[සංස්කරණය]

  • In country-specific articles, such as Economy of Australia, use the currency of the subject country.
  • In non-country-specific articles such as Wealth, use US dollars ($123), euros (€123), or pounds sterling (£123).

Currency names[සංස්කරණය]

Currency symbols[සංස්කරණය]

  • In general, the first mention of a particular currency should use its full, unambiguous signifier (e.g. A$52), with subsequent references using just the appropriate symbol (e.g. $88), unless this would be unclear. Exceptions:
  • In an article referring to multiple currencies represented by the same symbol (e.g. the dollars of the US, Canada, Australia, New Zealand, and other countries – ) use the full signifier (e.g. US$, A$) each time, except (possibly) where a particular context makes this both unnecessary and undesirable.
  • In articles entirely on EU-, UK- and/or US-related topics, all occurrences may be shortened (€26, £22 or $34), unless this would be unclear.
  • The pound sterling is represented by the £ symbol, with one horizontal bar. The double-barred symbol is ambiguous, as it has also been used for the Italian lira and other currencies. For non-British currencies that use pounds or a pound symbol (e.g. the Irish pound, IR£) use the symbol conventionally preferred for that currency.
  • If there is no common English abbreviation or symbol, follow the ISO 4217 standard.

Formatting[සංස්කරණය]

  • A period (full point, .) is used as the decimal point – never a comma ($6.57, not $6,57).
  • Do not place a currency symbol after the accompanying numeric figures (e.g. 123$, 123£, 123€) unless that is the normal convention for that currency when writing in English.[පැහැදීම ඇවැසිය] Never use forms such as $US123 or $123 (US).
  • Currency abbreviations that come before the numeric value are unspaced if they consist of a nonalphabetic symbol only, or end in a symbol (£123;   €123); but spaced if alphabetic (R 75).
  • Ranges should be expressed giving the currency signifier just once: $250 – 300, not $250 – $300.
  • million and billion should be spelled out on first use, and (optionally) abbreviated M or bn (both unspaced) thereafter: She received £70 million and her son £10M; the school's share was $250 – 300 million, and the charity's $400 – 450M.
  • In general, a currency symbol should be accompanied by a numeric amount e.g. not He converted his US$ to A$ but He converted his US dollars to Australian dollars or He exchanged the US$100 note for Australian dollars.
  • Exceptions may occur in tables and infoboxes where space is limited e.g. Currencies accepted for deposit: US$, SFr, GB£, . It may be appropriate to wikilink such uses, or add an explanatory note.

Conversions[සංස්කරණය]

  • Conversions of less-familiar currencies may be provided in terms of more familiar currencies – such as the US dollar, euro or pound sterling – using an appropriate rate (which is often not the current exchange rate). Conversions should be in parentheses after the original currency, rounding to avoid false precision (two significant digits is usually sufficient, as most exchange rates fluctuate significantly), with at least the year given as a rough point of conversion rate reference; e.g. Since 2001 the grant has been 10,000,000 Swedish kronor ($1.4M, €1.0M, or £800k අගෝස්තු 2009 වන විට), not ($1,390,570, €971,673 or £848,646).
  • For obsolete currencies, provide an equivalent (formatted as a conversion) if possible, in the modern replacement currency (e.g. decimal pounds for historical pre-decimal pounds-and-shillings), or a US-dollar equivalent where there is no modern equivalent.
  • In some cases it may be appropriate to provide a conversion accounting for inflation or deflation over time.

Common mathematical symbols[සංස්කරණය]

කෙටි මග:
WP:COMMONMATH
MOS:MINUS
  • This is not a complete list of symbols that may be used.
  • Spaces are placed to left and right when a symbol is used with two operands, but no space with one operand
  • The {{nbsp}} and {{nowrap}} templates may be used to prevent awkward linebreaks in mathematical material.
  • Many of these mathematical symbols are available in the "Insert" menu below the editing window and not have to be manually encoded as shown in this table, but just inserted with these tools.
Common mathematical symbols
Symbol name Example Markup Comments
Plus /
positive
x + y x + y
+y +y
Minus /
negative
xy x &minus; y Do not use hyphen (-) or dashes ({{ndash}} or {{mdash}}).
y &minus;y
Plus-minus /
minus-plus
41.5 ± 0.3 41.5 &plusmn; 0.3
−(±a) = ∓a &minus;(&plusmn;a) = &#8723;a
Multiplication,
cross
x × y x &times; y Do not use the letter x to indicate multiplication. However, an unspaced x may be used as a substitute for "by" in common terms such as 4x4.
Division, obelus x ÷ y x &divide; y
Equal / equals x = y x = y
Not equal xy x &ne; y
Approx. equal π ≈ 3.14 {{pi}} &asymp; 3.14
Less than x < y x &lt; y
L.T. or equal xy x &le; y
Greater than x > y x &gt; y
G.T. or equal xy x &ge; y

Note: The variables in this table represent editor input. To actually markup variables in wikitext, use the {{var}} template or <var>...</var> HTML element: {{var|x}} + {{var|y}} and <var>x</var> + <var>y</var> both produce: x + y.

Geographical coordinates[සංස්කරණය]

කෙටි මග:
WP:Coordinates
MOS:COORDS
Quick guide:
Quick how to
To add 57°18′22.5″N 4°27′32.7″W﻿ / ﻿57.306250°N 4.459083°W﻿ / 57.306250; -4.459083 to the top of an article, use
{{Coord|57|18|22.5|N|4|27|32.7|W|display=title}}

These coordinates are in degrees, minutes, and seconds of arc.

To add 44°06′43″N 87°54′47″W﻿ / ﻿44.112°N 87.913°W﻿ / 44.112; -87.913 to the top of an article, use either
{{Coord|44.112|N|87.913|W|display=title}}

or

{{Coord|44.112|-87.913|display=title}}

These coordinates are in decimal degrees.

  • Degrees, minutes and seconds must be separated by a pipe ("|").
  • Map datum should be WGS84.
  • Avoid excessive precision (0.0001° is <11 m, 1′′ is <31 m).
  • Latitude (N/S) must appear before longitude (E/W).
Optional coordinate parameters follow the longitude and are separated by an underscore ("_"):

Other optional parameters are separated by a pipe ("|"):

  • display
    display=inline (the default) to display in the body of the article only,
    display=title to display in the title only, or
    display=inline,title to display in both places.
  • name
    name=X to label the place on maps (default is PAGENAME)

Thus: {{Coord|44.117|-87.913|dim:30_region:US-WI_type:event

|display=inline,title|name=accident site}}

Geographical coordinates on Earth should be entered using a template to standardise the format and to provide a link to maps of the coordinates. As long as the templates are adhered to, a robot performs the functions automatically.

First, obtain the coordinates. Avoid excessive precision.

Two types of template are available:

  • {{coord}} offers users a choice of display format through user styles, emits a Geo microformat, and is recognised (in the title position) by the "nearby" feature of Wikipedia's mobile apps and by external service providers such as Google Maps and Google Earth, and Yahoo.
  • Infoboxes such as {{Infobox settlement}}, which automatically emit {{Coord}}.

The following formats are available.

  • For degrees only (including decimal values): {{coord|dd|N/S|dd|E/W}}
  • For degrees/minutes: {{coord|dd|mm|N/S|dd|mm|E/W}}
  • For degrees/minutes/seconds: {{coord|dd|mm|ss|N/S|dd|mm|ss|E/W}}

where:

  • dd, mm, ss are the degrees, minutes and seconds, respectively;
  • N/S is either N for northern or S for southern latitudes;
  • E/W is either E for eastern or W for western longitudes;
  • negative values may be used in lieu of S and W to denote Southern and Western Hemispheres

For example:

For the city of Oslo, located at 59° 55′ N, 10° 44′ E:

{{coord|59|55|N|10|44|E}} – which becomes 59°55′N 10°44′E﻿ / ﻿59.917°N 10.733°E﻿ / 59.917; 10.733

For a country, like Botswana, less precision is appropriate:

{{coord|22|S|24|E}} – which becomes 22°S 24°E﻿ / ﻿22°S 24°E﻿ / -22; 24

Higher levels of precision are obtained by using seconds:

{{coord|33|56|24|N|118|24|00|W}} – which becomes 33°56′24″N 118°24′00″W﻿ / ﻿33.94000°N 118.40000°W﻿ / 33.94000; -118.40000

Coordinates can be entered as decimal values

{{coord|33.94|S|118.40|W}} – which becomes 33°56′S 118°24′W﻿ / ﻿33.94°S 118.40°W﻿ / -33.94; -118.40

Increasing or decreasing the number of decimal places controls the precision. Trailing zeros should be used as needed to ensure that both values have the same level of precision.

London Heathrow Airport, Amsterdam, Jan Mayen and Mount Baker are examples of articles that contain geographical coordinates.

Generally, the larger the object being mapped, the 'less precise the coordinates should be. For example, if just giving the location of a city, precision greater than 100 meters is not needed unless specifying a particular point in the city, for example the central administrative building. Specific buildings or other objects of similar size would justify precisions down to 10 meters or even one meter in some cases (1′′ ~15 m to 30 m, 0.0001° ~5.6 m to 10 m).

The final field, following the E/W, is available for attributes such as type:, region:, or scale:

.

When adding coordinates, please remove the {{coord missing}} tag from the article, if present.

Templates other than {{coord}} should use the following variable names for coordinates: lat_d, lat_m, lat_s, lat_NS, long_d, long_m, long_s, long_EW.

See also[සංස්කරණය]

සැකිල්ල:Math templates

Notes and references[සංස්කරණය]

  1. Wikipedia:Requests for arbitration/Jguk § Principles, Wikipedia:Requests for arbitration/jguk 2 § Principles, and Wikipedia:Requests for arbitration/Sortan § Principles
  2. CCTF/09-32: Coordinated Universal Time (UTC). BIPM. 2009-06-02. පි. 3. http://www.bipm.org/cc/CCTF/Allowed/18/CCTF_09-32_noteUTC.pdf. Retrieved 2015-08-20. "This coordination began on January 1, 1960, and the resulting time scale began to be called informally 'Coordinated Universal Time.' " 
  3. Only certain citation styles use abbreviated date formats.
  4. All-numeric yyyy-mm-dd dates might be assumed to follow the ISO 8601 standard, which mandates the Gregorian calendar. Also, technically all must be four-digit years, but Wikipedia is unlikely to ever need to format a far-future date beyond the year 9999.
  5. Wikipedia talk:Manual of Style/Archive 151 § RFC: Month abbreviations
  6. The routine linking of dates is deprecated. This change was made August 24, 2008, on the basis of this archived discussion. It was ratified in two December 2008 RfCs Wikipedia:Manual of Style/Dates and numbers/Three proposals for change to MOSNUM and Wikipedia:Manual of Style/Dates and numbers/Date Linking RFC
  7. These formats cannot, in general, be distinguished on sight, because there are usages in which 03-04-2007 represents March 4, and other usages in which it represents April 3. In contrast there is no common usage in which 2007-04-03 represents anything other than April 3.
  8. Wikipedia talk:Manual of Style/Dates and numbers/Archive 144 § Date range redux
  9. The number in parentheses is the numerical value of the standard uncertainty referred to the corresponding last digits of the quoted result – .
  10. If there is disagreement about the primary units used in a UK-related article, discuss the matter on the article talk-page, at MOSNUM talk, or both. If consensus cannot be reached, refer to historically stable versions of the article and retain the units used in these as the primary units. Note the style guides of British publications such as The Times (see archived version, under "Metric").
  11. SI Brochure: The International System of Units (SI) (8th සංස්.). BIPM. 2014. http://www.bipm.org/en/publications/si-brochure/. Retrieved 2015-08-20.  Tables 6, 7, 8, and 9 give additional guidance on non-SI units.
  12. These definitions are consistent with all units of measure mentioned in the SI Brochure and with all units of measure catalogued in EU directive 80/181/EEC [1].
  13. Wikipedia follows common practice regarding bytes and other data traditionally quantified using binary prefixes (e.g. සැකිල්ල:Xtn and සැකිල්ල:Xtn, meaning 220 and 210 respectively) and their unit symbols (e.g. සැකිල්ල:Xtn and සැකිල්ල:Xtn) for RAM and decimal prefixes for most other uses. Despite the IEC's 1998 international standard creating several new binary prefixes (e.g. mebi-, kibi-) to distinguish the meaning of the decimal SI prefixes (e.g. සැකිල්ල:Xtn and සැකිල්ල:Xtn, meaning 106 and 103 respectively) from the binary ones, and the subsequent incorporation of these IEC prefixes into the ISO/IEC 80000, consensus on Wikipedia in computing-related contexts currently favours the retention of the more familiar but ambiguous units සැකිල්ල:Xtn, සැකිල්ල:Xtn, සැකිල්ල:Xtn, සැකිල්ල:Xtn, සැකිල්ල:Xtn, සැකිල්ල:Xtn, etc. over use of unambiguous IEC binary prefixes.

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