What's the difference between var myvar; and var myvar= null;?
<p>What's the difference between</p>

<pre><code>var myvar;
</code></pre>

<p>and </p>

<pre><code>var myvar = null;
</code></pre>

<p>?</p>

<p>I've just seen both next to next in professional code and wondering what this is all about...</p>
