what the meaning of plus operator in this JQUERY scripts
<p>I want to ask mean of plus operator in this script +i+ in the follow:</p>

<pre><code>i=0;
// next line in scripts write this code :
$('.container[data-id='+i+']').hide(); // +i+ what the meaning of it
</code></pre>

<p>Need Help thanks a TON</p>
