isupper man page on BSDi
[printable version]
ISUPPER(3) BSD 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 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 C X3.159-1989 (``ANSI C '').
BSDI BSD/OS June 29, 1991 1
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