<p>Write a function to swap a number in place (that is, without temporary variables).</p>



<p><strong>Example: </strong></p>



<pre>

<strong>Input:</strong> numbers = [1,2]

<strong>Output:</strong> [2,1]

</pre>



<p><strong>Note: </strong></p>



<ul>

	<li><code>numbers.length == 2</code></li>

	<li><code>-2147483647 &lt;= numbers[i] &lt;=&nbsp;2147483647</code></li>

</ul>