shortest expression to return false for negative number and the number itself for positive number (or zero)
<p>What is the shortest expression I can use to return <code>false</code> for all <code>numbers &lt; 0</code> and the number itself for all <code>numbers &gt;= 0</code>?</p>

<p>Left is what I have, right is want I want to be returned.</p>

<pre><code>-3: false
-1: false
 0:  0
 1:  1
23: 23
</code></pre>

<p>Something really short like:</p>

<pre><code>(!!number)   &lt;-- (doenst work)
</code></pre>
