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NetBSD 6.1.5 - man page for isupper (netbsd section 3)

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ISUPPER(3)			   BSD Library Functions Manual 		       ISUPPER(3)

NAME
     isupper -- upper-case character test

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     isupper(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() function returns zero if the character tests false and returns non-zero if the
     character tests true.

SEE ALSO
     ctype(3), 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 C89'').

CAVEATS
     The argument to isupper() must be EOF or representable as an unsigned char; otherwise, the
     behavior is undefined.  See the CAVEATS section of ctype(3) for more details.

BSD					  April 17, 2008				      BSD
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