From: Joel Pearson <lists@...>
Date: 2013-06-12T07:15:55+09:00
Subject: Re: Loop with range question

3..6 is a Range, and Integers like 1 are class Fixnum. You can see more 
of what Ranges are capable of here: 
http://ruby-doc.org/core-1.9.3/Range.html

You'd get "undefined method 'between'" if you forgot the question mark 
from "between?". It's general practice in Ruby for methods which return 
a Boolean to end with a question mark.

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