Hi, I know nothing about programming but have been reading Chris Pine's book on Learning to Program , The Facets of Ruby series. I watched your videos on beginning programming for Ruby. I am only a couple of chapters into his book, but I am wondering why I would use the irb versus the method he has us using? He has us using a text editor then saving then using the command prompt. Could you explain about the difference? It looks like he only touches on Ruby Interactive a little at the end of his book.