Why prepend a $ to variable name
<p>I am trying to learn jQuery and I came across this line in an example.</p>

<pre><code>var $title = $(tag).attr('title');
</code></pre>

<p>Can someone please tell me what the prepended $ is for in $title.</p>

<p>The example seems to work fine if I replace $title with just title.</p>

<p>I understand this is probably a stupid question but it is a waste of time googling for "purpose of $"</p>

<p>Many thanks.</p>
