ISUPPER(3)                386BSD Programmer's Manual                ISUPPER(3)

NAME
     isupper - upper-case character test

SYNOPSIS
     #include <ctype.h>

     int
     supper(int c)

DESCRIPTION
     The isupper() function tests for any upper-case letter or any of an
     implementation-defined set of characters for which none of iscntrl(3),
     isdigit(3),  ispunct(3),  or isspace(3) is true.  In the ``C'' locale,
     isupper() returns true only for the characters defined as upper-case
     letters.

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

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

STANDARDS
     The isupper function conforms to ANSI C3.159-1989 (``ANSI C'').

BSD Experimental                 June 29, 1991                               1