isascii
— test for
ASCII character
Standard C Library (libc, -lc)
#include
<ctype.h>
int
isascii
(int
c);
The
isascii
()
function tests for an ASCII character, which is any character between 0 and
octal 0177 inclusive.
The isascii
() function first appeared in
Version 7 AT&T UNIX.