title: JavaScript | operator
body: <p>Anyone able to explain what "|" and the value after does? I know the output for 0 creates sets of 13, the numbers, 3, 2, 1, 0. But what about | 1, or | 2.</p>
  
  <pre><code>var i = 52;
  while(i--) {
      alert(i/13 | 0);
  }
  </code></pre>