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