What is this javascript syntax? !function(){}
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/3755606/what-does-the-exclamation-mark-do-before-the-function">What does the exclamation mark do before the function?</a>  </p>
</blockquote>



<p>I came across this today and have never seen before:</p>

<pre><code>!function($) {
//contents removed

}( window.jQuery );
</code></pre>

<p>I am specifically wondering what the exclamation point does. Is there any documentation on it? Internet searches haven't yielded good results.</p>

<p>Thanks!</p>
