The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

#### NAME

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

#### SYNOPSIS

> ``[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

> 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.

End of informative text.

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