Synopsis
#include <ctype.h>
int isalnum(int c);
Description

isalnum returns nonzero (true) if and only if isalpha or isdigit return true for value of the argument c.

Portability

isalnum conforms to ISO/IEC 9899:1990 (C90) and ISO/IEC 9899:1999 (C99).

See also

isalpha   isdigit