title: What does .between? method means in Ruby?
body: <p>I have a exercise of the school and i can't resolve it. Can you help me?
  The problem is this:</p>
  
  <blockquote>
    <p>Try using a method that takes two arguments - use the between? method
    to determine if the number 2 lies between the numbers 1 and 3.</p>
  </blockquote>
  
  <p>I tried to find what is the <em>.between?</em> method but í couldn't find it.
  I just know that is a method </p>