title: Cut a string with a known start & end index
body: <p>When I have a string that I want to cut into a new string from a certain Index to a certain Index, which function do I use?</p>
  
  <p>If the string was:</p>
  
  <blockquote>
    <p>ABCDEFG</p>
  </blockquote>
  
  <p>This would mean retrieving <em>BCD</em> when the two indexes specified were <em>1</em> and <em>3</em>.</p>