NAME

isascii — ASCII character test

SYNOPSIS

#include <ctype.h>

int
isascii(int c);

DESCRIPTION

The isascii() function tests for an ASCII character, which is any character in the range from 0 to 0177, inclusive.

RETURN VALUES

The isascii() function returns zero if the character tests false or non-zero if the character tests true.

SEE ALSO

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

STANDARDS

The isascii() function conforms to X/Open Portability Guide Issue 4 (“XPG4”).

HISTORY

The isascii() function first appeared in Version 7 AT&T UNIX.