ISASCII(3) Library Functions Manual ISASCII(3)

isascii — test for a 7-bit US-ASCII character


#include <ctype.h>

int isascii(int c);

The isascii () function shall test whether c is a 7-bit US-ASCII character code.

The isascii () function is defined on all integer values.

The isascii () function shall return non-zero if c is a 7-bit US-ASCII character code between 0 and octal 0177 inclusive; otherwise, it shall return 0.

No errors are defined.

None.

None.

None.

None.

The Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <ctype.h>

First released in Issue 1. Derived from Issue 1 of the SVID.

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January 1, 2004 posix.fail