title: JSTL LOOP - counter +=3 Increment
body: <p>I have to iterate a collections in JSTL, but I would like the index to be incremented +3 each loop, something like</p>
  
  <pre><code>for (int i=0; i&lt;50; i+=3) {
  }
  </code></pre>
  
  <p>but in JSTL</p>