title: meaning of (number) & (-number)
body: <p>What is the meaning of  <code>(number) &amp; (-number)</code>? I have searched it but was unable to find the meaning</p>
  
  <p>I want to use <code>i &amp; (-i)</code> in for loop like:</p>
  
  <pre><code>for (i = 0; i &lt;= n; i += i &amp; (-i))
  </code></pre>