Converting string to expression
<p>Is there any way to convert a string to an expression?</p>

<p>my string: <code>var1 == null &amp;&amp; var2 != 5</code></p>

<p>I want to use this string as a condition of the <code>if()</code>, Like <code>if(var1 == null &amp;&amp; var2 != 5)</code></p>
