ISCNTRL(3)

NAME
iscntrl - control character test

SYNOPSIS
#include <ctype.h>
int
iscntrl(int c);

DESCRIPTION
The iscntrl() function tests for any control character.

RETURN VALUES
The iscntrl() macro returns zero if the character tests false and returns non-zero if the character tests true.

SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), isdigit(3), isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3), toascii(3), tolower(3), toupper(3), stdio(3), ascii(7)

STANDARDS
The iscntrl() function conforms to ansiC.