Manpage of ISUPPER
ISUPPER
Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME
2.10 `isupper'--uppercase character predicate
SYNOPSIS
#include <ctype.h>
int isupper(int C);
DESCRIPTION
`isupper' is a macro which classifies ASCII integer values by table
lookup. It is a predicate returning non-zero for upper-case letters
(`A'-`Z'), and 0 for other characters. It is defined only when
`isascii'(C) is true or C is EOF.
You can use a compiled subroutine instead of the macro definition by
undefining the macro using ``#undef isupper''.
RETURNS
`isupper' returns non-zero if C is a upper case letter (A-Z).
PORTABILITY
`isupper' is ANSI C.
No supporting OS subroutines are required.
SEE ALSO
isupper
is part of the
libc
library.
The full documentation for
libc
is maintained as a Texinfo manual. If
info
and
libc
are properly installed at your site, the command
-
info libc
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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