ISASCII(P)                                                                             ISASCII(P)



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

SYNOPSIS
       #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>

COPYRIGHT
       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2003  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003  by
       the  Institute  of  Electrical  and  Electronics Engineers, Inc and The Open Group. In the
       event of any discrepancy between this version and the original IEEE  and  The  Open  Group
       Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .



POSIX                                          2003                                    ISASCII(P)