title: wp_enqueue_script( ) function parameters in functions.php
body: <p>I am making my first steps coding. I already made some courses of php in internet and now I am trying to continue learning from the practice while I am making a Wordpress theme.</p>
  
  <p>I made a child theme from an existing theme and there is something that I dont understand in this function:</p>
  
  <pre><code>wp_enqueue_script( 'twentyfourteen-script', get_template_directory_uri() . '/js/functions.js', array( 'jquery' ), '20150315', true );
  </code></pre>
  
  <p>I found this in the site of wordpress:</p>
  
  <pre><code>wp_enqueue_script( $handle, $src, $deps, $ver, $in_footer );
  </code></pre>
  
  <p>I understand that $handle is the name of the script file, but i have to put that name in some place in the script file to make my code work?</p>
  
  <p>Then i know that I should write <code>get_template_directory_uri()</code>, the source, and write <code>array(jquery)</code> in the case that it is a jquery file but what means <code>'20150315', true</code> . What means that number? Why I have to write <code>true</code> at the end?</p>