netbsd man page for tolower

TOLOWER(3)						   BSD Library Functions Manual 						TOLOWER(3)

NAME
     tolower -- upper case to lower case letter conversion

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <ctype.h>

     int
     tolower(int c);

DESCRIPTION
     The tolower() function converts an upper-case letter to the corresponding lower-case letter.

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

SEE ALSO
     ctype(3), isalnum(3), isalpha(3), isascii(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() function conforms to ANSI X3.159-1989 (``ANSI C89'').

CAVEATS
     The argument to tolower() must be EOF or representable as an unsigned char; otherwise, the behavior is undefined.	See the CAVEATS section of
     ctype(3) for more details.

BSD
								  April 17, 2008							       BSD