ISLOWER(3) NEWLIB ISLOWER(3)NAME
3.6 `islower'--lowercase character predicate
SYNOPSIS
#include <ctype.h>
int islower(int C);
DESCRIPTION
`islower' is a macro which classifies ASCII integer values by table
lookup. It is a predicate returning non-zero for minuscules (lowercase
alphabetic characters), 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 islower''.
RETURNS
`islower' returns non-zero if C is a lowercase letter (`a'-`z').
PORTABILITY
`islower' is ANSI C.
No supporting OS subroutines are required.
SEE ALSOislower is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 ISLOWER(3)