title: How to append elements into a dictionary in Swift?
body: <p>I have a simple Dictionary which is defined like:</p>
  
  <pre><code>var dict : NSDictionary = [ 1 : "abc", 2 : "cde"]
  </code></pre>
  
  <p>Now I want to add an element into this dictionary: <code>3 : "efg"</code></p>
  
  <p>How can I append <code>3 : "efg"</code> into this existing dictionary?</p>