title: Swapping using two variables not three?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/1826159/swapping-two-variable-value-without-using-3rd-variable">Swapping two variable value without using 3rd variable</a>  </p>
  </blockquote>
  
  
  
  <p>we have </p>
  
  <pre><code>int a=4;
  int b=7;
  </code></pre>
  
  <p>can i swap these no.s without using third variable?</p>