title: Operators Increment in AngularJS Expressions
body: <p>I using angularjs and in controller, I initialize a variable as following:</p>
  
  <pre><code>$scope.x = 0;
  </code></pre>
  
  <p>I want to increment variable x in html and  I write expression as following:</p>
  
  <pre><code>&lt;div index = {{x++}}&gt;&lt;/div&gt;
  &lt;a index = {{x++}}&gt;&lt;/a&gt;
  &lt;b index = {{x++}}&gt;&lt;/b&gt;
  &lt;p index = {{x++}}&gt;&lt;/p&gt;
  </code></pre>
  
  <p>but isn't success
  how can I do?</p>
  
  <p>don't use ng-click, ng-repeat,...</p>