title: Working with C# Math.Abs return value- not getting expected output
body: <p>I want to find the delta value of a number.<br>
  I tried to with this. I used <code>Abs</code> function. It is working fine for whole numbers.<br>
  But when i try to do the following,</p>
  
  <pre><code>var gh = Math.Abs(3.223 - 6.243);  
  </code></pre>
  
  <p>it returns <code>3.0200000000000005</code> . But i am expecting  <code>3.02</code>.<br>
  Why? how to get <code>3.02</code>?</p>