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ISSPACE(3)                NetBSD Programmer's Manual                ISSPACE(3)


NAME

     isspace - white-space character test


SYNOPSIS

     #include <ctype.h>

     int
     isspace(int c);


DESCRIPTION

     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 white-
     space characters.


RETURN VALUES

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


SEE ALSO

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


STANDARDS

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

4.4BSD                           July 31, 1991                               1