NAME    [Toc]    [Back]

     isspace - white-space character test

LIBRARY    [Toc]    [Back]

     Standard C Library (libc, -lc)

SYNOPSIS    [Toc]    [Back]

     #include <ctype.h>

     int
     isspace(int c);

DESCRIPTION    [Toc]    [Back]

     The isspace() function tests for the standard white-space characters for
     which isalnum(3) is false.  The standard white-space characters are the
     following:

           ` '    Space character.
           \f     Form feed.
           \n     New-line.
           \r     Carriage return.
           \t     Horizontal tab.
           \v     And vertical tab.

     In the ``C'' locale, isspace() returns true only for the standard whitespace
 characters.

RETURN VALUES    [Toc]    [Back]

     The isspace() macro returns zero if the character tests false and returns
     non-zero if the character tests true.

SEE ALSO    [Toc]    [Back]

     isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
     isgraph(3), islower(3), isprint(3), ispunct(3), isupper(3), isxdigit(3),
     stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)

STANDARDS    [Toc]    [Back]

     The isspace() function conforms to ANSI X3.159-1989 (``ANSI C'').

BSD                              July 31, 1991                             BSD