The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2003 Edition
Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.

NAME

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

SYNOPSIS

[XSI] [Option Start] #include <ctype.h>

int isascii(int c); [Option End]

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

None.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

The Base Definitions volume of IEEE Std 1003.1-2001, <ctype.h>

CHANGE HISTORY

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

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