.\" Copyright (c) 1989, 1991 The Regents of the University of California.
.\" This code is derived from software contributed to Berkeley by
.\" the American National Standards Committee X3, on Information
.\" %sccs.include.redist.man%
.\" @(#)tolower.3 5.2 (Berkeley) %G%
.Nd upper case to lower case letter conversion
function converts an upper-case letter to the corresponding lower-case
If the argument is an upper-case letter, the
function returns the corresponding lower-case letter if there is
one; otherwise the argument is returned unchanged.
.\" maps only the characters for which
.\" is true to the corresponding characters for which