TOLOWER(3)                OpenBSD Programmer's Manual               TOLOWER(3)

NAME
     tolower, _tolower - upper case to lower case letter conversion



SYNOPSIS
     #include <ctype.h>

     int
     tolower(int c);

     int
     _tolower(int c);

DESCRIPTION
     The tolower() function converts an upper-case letter to the corresponding
     lower-case letter.  The _tolower() function is identical to tolower() ex-
     cept that c must be an upper-case letter.

RETURN VALUES
     If the argument to the tolower() function is an upper-case letter, the
     corresponding lower-case letter is returned if there is one; otherwise
     the argument is returned unchanged.  If the argument to the _tolower()
     function is an upper-case letter, the corresponding lower-case letter is
     returned; otherwise the output is undefined.

SEE ALSO
     isalnum(3),  isalpha(3),  isascii(3),  isblank(3),  iscntrl(3),
     isdigit(3),  isgraph(3),  islower(3),  isprint(3),  ispunct(3),
     isspace(3),  isupper(3),  isxdigit(3),  stdio(3),  toascii(3),
     toupper(3),  ascii(7)

STANDARDS
     The tolower() and _tolower() functions conform to ANSI X3.159-1989
     (``ANSI C'').

OpenBSD 2.6                     August 15, 1997                              1