What is the use of eval function inside Javascript?
<pre><code>&lt;html&gt;
&lt;body&gt;
&lt;script type="text/javascript"&gt;
document.write("&lt;br /&gt;" + eval("2+2"));
&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>This gives me output as 4.</p>

<p>If i remove the eval function and run the same thing know it gives me the same output that is 4</p>

<pre><code>&lt;html&gt;
&lt;body&gt;
&lt;script type="text/javascript"&gt;
document.write("&lt;br /&gt;" + (2+2);
&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
