I want the input to be validated no matter the upper or lowercase
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How do I do a case-insensitive string comparison?
111499
How to set Sqlite3 to be case insensitive when string comparing?
17103
Making unique key case insensitive
10610
How can I check if a single character appears in a string?
53124
How to make HTML input tag only accept numerical values?
105512
How to replace string and preserve its uppercase/lowercase
120682
How do I verify that a string only contains letters, numbers, underscores and dashes?
110451
How to check if a string is numeric?
35850
Using regular expressions to validate a numeric range
64111
Is my JavaScript validating enough?
71712
How do I get this code to stop input when the sum exceeds 100 and still preform the sum and average?
136275
Validating user's UTF-8 name in Javascript
59938
Android: How can I validate EditText input?
94488
How to compare strings ignoring the case
98104
How do I lowercase a string in Python?
30248
How to detect lowercase letters in Python?
26842
Function to check if input string is an integer or floating point number?