title: Copy command in PostScript
body: <p>I am reading algorithms by RobertSedwick at following link</p>
  
  <p><a href="http://books.google.co.in/books?id=pQRLfMngZ7sC&amp;pg=PA213&amp;lpg=PA213&amp;dq=towers+of+hanoi+relation+with+trailing+zeros&amp;source=bl&amp;ots=gfM2UdBkNq&amp;sig=avk5lNz7XeNODghvOlvHKSGMc8g&amp;hl=en#v=onepage&amp;q=towers%20of%20hanoi%20relation%20with%20trailing%20zeros&amp;f=false" rel="nofollow">http://books.google.co.in/books?id=pQRLfMngZ7sC&amp;pg=PA213&amp;lpg=PA213&amp;dq=towers+of+hanoi+relation+with+trailing+zeros&amp;source=bl&amp;ots=gfM2UdBkNq&amp;sig=avk5lNz7XeNODghvOlvHKSGMc8g&amp;hl=en#v=onepage&amp;q=towers%20of%20hanoi%20relation%20with%20trailing%20zeros&amp;f=false</a></p>
  
  <p>Page number: 218 Fig 5.13</p>
  
  <p>What does following statement mean in PostScript.</p>
  
  <pre><code> 2 copy ge {dup 0 rlineto}
   {
      ...
   } ifelse
  </code></pre>
  
  <p>And also what does following means</p>
  
  <pre><code>   2 copy KochR
  </code></pre>
  
  <p>I am looking into PostScript first time here.</p>