ont color="#82140F"><code>read columns</code></font>'.
<p>
<li> `<font color="#82140F"><code>..words_in_dataline..</code></font>'
<!-- latex: \index{@code{..words_in_dataline..}} -->
Number of words on last dataline.  This is useful in constructs like
<p>
<TABLE SUMMARY="Example" BORDER="0" BGCOLOR="#efefef" WIDTH="100%">
<TR>
<TD>
<PRE>
<font color="#82140F">
open tmp.dat
.num. = 0
while 1
  read .a. .b.
  if !..words_in_dataline..
    show "Got empty line or EOF, so break loop"
    break
  end if
  show "