ISSPACE(3)

NAME
3.9 `isspace'--whitespace character predicate

SYNOPSIS
     #include <ctype.h>
     int isspace(int C);

DESCRIPTION
`isspace' is a macro which classifies ASCII integer values by table lookup. It is a predicate returning non-zero for whitespace characters, and 0 for other characters. It is defined only when `isascii'(C) is true or C is EOF.
   You can use a compiled subroutine instead of the macro definition by undefining the macro using ``#undef isspace''.

RETURNS
`isspace' returns non-zero if C is a space, tab, carriage return, new line, vertical tab, or formfeed (`0x09'-`0x0D', `0x20').

PORTABILITY
`isspace' is ANSI C.
   No supporting OS subroutines are required.

SEE ALSO
isspace is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.