title: Difference between sqrt(x) and pow(x,0.5)
body: <p>I was wondering why there is sqrt() function in C/c++ as we can achieve the same using </p>
  
  <pre><code>pow(x,0.5);
  </code></pre>
  
  <p>how is <code>sqrt(x)</code> different for <code>pow(x,0.5)</code> . Is there a specific reason of having sqrt function?</p>