islower man page on BSDi
[printable version]
ISLOWER(3) BSD Programmer's Manual ISLOWER(3)
NAME
islower - lower-case character test
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
isascii(3), isalnum(3), isalpha(3), iscntrl(3), isdigit(3),
isgraph(3), isprint(3), ispunct(3), isspace(3), isupper(3),
isxdigit(3), toascii(3), tolower(3), toupper(3), stdio(3) ascii(7)
STANDARDS
The islower() function conforms to ANSI C X3.159-1989 (``ANSI C '').
BSDI BSD/OS June 29, 1991 1
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