isspace(3)                          CLIX                          isspace(3)



  NAME

    isspace - Tests for a space character

  LIBRARY

    Standard C Library (libc.a)

  SYNOPSIS

    #include <ctype.h>

    int isspace(
      int c );

  PARAMETERS

    c   An integer representing a character.

  DESCRIPTION

    The isspace() macro tests for a space, horizontal tab, carriage return,
    newline, vertical tab, or formfeed.  The isspace() macro is defined on
    valid members of the character set and on the single value EOF (guaranteed
    not to be a character set member).  See stdio.

    The classification macro isspace() does a table lookup.

  EXAMPLES

    To test if the character read from stdin is a space character:

    #include <ctype.h>
    int c;
       .
       .
       .
    /* get a character from stdin */
    printf("enter a character:");
    c = getchar();

    /* check to see if a digit was read */
    if (isspace(c))
         printf("read a space character\n");


  CAUTIONS

    If the argument to any character handling macro is not in the domain of
    the function, the result is undefined.




  2/94 - Intergraph Corporation                                              1

  isspace(3)                          CLIX                          isspace(3)



  RETURN VALUES

    The isspace() macro returns 0 for false and nonzero numbers for true.

  RELATED INFORMATION

    Commands:  chrtbl(1)

    Functions:  isdigit(3), isxdigit(3), islower(3), isupper(3), isalpha(3),
    isalnum(3), iscntrl(3), ispunct(3), isprint(3), isgraph(3), isascii(3),
    tolower(3), toupper(3), toascii(3), _tolower(3), _toupper(3),
    setchrclass(3), stdio(3)

    Miscellany:  environ(4)








































  2                                              Intergraph Corporation - 2/94