The purpose of the comma operator in javascript (x, x1, x2, …, xn) 
<p>in javascript <code>(x, x1, x2, …, xn)</code> always returns xn.</p>

<p>In python this code is called tuple and it returns different values.</p>

<p>My question is what is the purpose of this code in javascript?</p>

<p>Do you have some practical example?</p>

<p>thanks.</p>
