title: Difference between call by reference and call by value
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/2207179/difference-between-value-parameter-and-reference-parameter">Difference between value parameter and reference parameter ?</a>  </p>
  </blockquote>
  
  
  
  <p>What is the difference between call by reference and call by value?</p>