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tolower
=======

Syntax
------

     #include <ctype.h>
     
     int tolower(int c);

Description
-----------

This function returns C, converting it to lower case if it is upper
case.  toupper:.   

Return Value
------------

The lower case letter.

Example
-------

     for (i=0; buf[i]; i++)
       buf[i] = tolower(buf[i]);