ISUPPER(3)                OpenBSD Programmer's Manual               ISUPPER(3)

NAME
     isupper - upper-case character test



SYNOPSIS
     #include <ctype.h>

     int
     isupper(int c);

DESCRIPTION
     The isupper() function tests for any upper-case letter or any of an im-
     plementation-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 let-
     ters.

RETURN VALUES
     The isupper() macro returns zero if the character tests false or 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),
     isspace(3),  isxdigit(3),  stdio(3),  toascii(3),  tolower(3),
     toupper(3),  ascii(7)

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

OpenBSD 2.6                      June 29, 1991                               1