title: isNaN function in nodejs
body: <p>why is isNaN function in nodejs returning <strong>false</strong> in the following cases?</p>
  
  <pre><code>isNaN(''),isNaN('\n'),isNaN('\t')
  </code></pre>
  
  <p>this is very weird.</p>
  
  <p>does somebody have any ideas as I thought isNaN stood for is Not a Number.</p>
  
  <p>can someone please clarify</p>
  
  <p>Thanks in advance!</p>