isalnum()

NAME

isalnum() - alphanumeric character test

SYNOPSIS

#include <ctype.h>


int isalnum (int c)

DESCRIPTION

The isalnum(3) call tests for any character for which isalpha(3) or isdigit(3) is true.

RETURN VALUES

The isalnum(3) function returns zero if the character tests false and returns non-zero if the character tests true.

SEE ALSO

isalpha(3)

isblank(3)

iscntrl(3)

isdigit(3)

isgraph(3)

islower(3)

isprint(3)

ispunct(3)

isspace(3)

isupper(3)

isxdigit(3)

tolower(3)

toupper(3)