title: Return result from groovy readline
body: <p>I need to read an Nth line from my text file and then assign that line to a string. I already have N, which I get with a loop. This needs to be for groovy:</p>
  
  <p><strong>pseudo code</strong></p>
  
  <pre><code>Def temp = readline(Linenumber);
  </code></pre>