NAME

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

SYNOPSIS

[OB XSI]
#include <ctype.h>

int isascii(int c);

DESCRIPTION

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

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

RETURN VALUE

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.

ERRORS

No errors are defined.

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

The isascii () function cannot be used portably in a localized application.

RATIONALE

None.

FUTURE DIRECTIONS

The isascii () function may be removed in a future version.

SEE ALSO

XBD <ctype.h>

CHANGE HISTORY

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

Issue 7

The isascii () function is marked obsolescent.

End of informative text.