Character Testing
ANSI 4.3.1 The sets of characters tested for by the isalnum
, isalpha
, iscntrl
, islower
, isprint
, and isupper
functions
The following list describes these functions as they are implemented by the Microsoft C compiler.
Function | Tests For |
---|---|
isalnum |
Characters 0 - 9, A-Z, a-z ASCII 48-57, 65-90, 97-122 |
isalpha |
Characters A-Z, a-z ASCII 65-90, 97-122 |
iscntrl |
ASCII 0 -31, 127 |
islower |
Characters a-z ASCII 97-122 |
isprint |
Characters A-Z, a-z, 0 - 9, punctuation, space ASCII 32-126 |
isupper |
Characters A-Z ASCII 65-90 |
See also
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