islower(3) - NetBSD Manual Pages

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ISLOWER(3)                NetBSD 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

     isalnum(3),  isalpha(3),  isascii(3),  isblank(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 X3.159-1989 (``ANSI C'').

4.4BSD                           June 29, 1991                               1