islower(3)
- NetBSD Manual Pages
ISLOWER(3) NetBSD Programmer's Manual ISLOWER(3)
NAME
islower - lower-case character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <ctype.h>
int
islower(int c);
DESCRIPTION
The islower() function tests for any lower-case letter for which none of
iscntrl(3), isdigit(3), ispunct(3), or isspace(3) is true. In the ``C''
locale, islower() returns true only for the characters defined as lower-
case letters.
RETURN VALUES
The islower() macro returns zero if the character tests false and returns
non-zero if the character tests true.
SEE ALSO
isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
isgraph(3), isprint(3), ispunct(3), isspace(3), isupper(3), isxdigit(3),
stdio(3), toascii(3), tolower(3), toupper(3), ascii(7)
STANDARDS
The islower() function conforms to ANSI X3.159-1989 (``ANSI C'').
NetBSD 1.6 June 29, 1991 1
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