title: what does it mean: if (number)
body: <p>I have:</p>
  
  <pre><code>float number = 2.5;
  if (number) cout &lt;&lt; "1\n";
  else        cout &lt;&lt; "2\n";
  </code></pre>
  
  <p>what does it mean: <code>if (number)</code>? maybe if the number is initialized?</p>