title: Display only last three items of a tcl list
body: <p>I currently iterate through a tcl list using the following way</p>
  
  <pre><code>foreach  i  $listname  {
      puts $i
  }
  </code></pre>
  
  <p>How could I only display the last three items of a list ?
  In c++ I would do something like this</p>
  
  <pre><code>for( int i = listname.size()-1; i&gt;=0;i--)
  {
  }
  </code></pre>