MirBSD manpage: islower(3)

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 lo-
     cale, islower() returns true only for the characters defined as lower-
     case letters.

RETURN VALUES

     The islower() macro returns zero if the character tests false or 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 C89").

CAVEATS

     The argument to islower() must be EOF or representable as an unsigned
     char; otherwise, the result is undefined.

MirBSD #10-current              June 29, 1991                                1

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