Hi -- On Fri, 25 Sep 2009, Fred Ige wrote: > I am trying to make a simple temperature converter, and I want to ask > for F temperature (numerical value) > > what command do I use? The bread-and-butter way to get keyboard input is with gets: print "Enter a number: " line = gets and then, since line is a string: num = line.to_i You can get fancier with error-checking, etc., but that's the basic idea. David -- David A. Black, Director Ruby Power and Light, LLC (http://www.rubypal.com) Ruby/Rails training, consulting, mentoring, code review Book: The Well-Grounded Rubyist (http://www.manning.com/black2)