isalpha
Synopsis
#include <ctype.h>
int isalpha(int c);
Status
Implemented
Conformance
IEEE Std 1003.1-2017
Description
The isalpha()
function shall test whether c is a character of class alpha in the current locale.
The c argument is an int
, the value of which the application shall ensure is representable as an unsigned char
or
equal to the value of the macro EOF
. If the argument has any other value, the behavior is undefined.
Return value
The isalpha()
function shall return non-zero if c is an alphanumeric character, otherwise shall return 0
.
Errors
No errors are defined.
Tests
Tested
Known bugs
None