title: How to iterate for loop in reverse order in swift?
body: <p>When I use the for loop in Playground, everything worked fine, until I changed the first parameter of for loop to be the highest value. (iterated in descending order)</p>
  
  <p>Is this a bug? Did any one else have it?</p>
  
  <pre><code>for index in 510..509
  {
      var a = 10
  }
  </code></pre>
  
  <p>The counter that displays the number of iterations that will be executions keeps ticking...</p>
  
  <p><img src="https://i.stack.imgur.com/FTvt4.png" alt="enter image description here"></p>