title: Haskell lists difference
body: <p>I'm trying make a lists difference. Found directly prelude operator <code>\\\\</code> that makes lists difference. But errors <code>Not in scope: '\\\\'</code> occurs. Here is my simple from command line interpreter:</p>
  
  <pre><code>Prelude&gt;  ([1,2,3] ++ [5,6])   -- works like expected
  [1,2,3,4,5,6]
  
  prelude&gt;  ([1,2,3] \\\\ [1,2])   -- erros occurs
  &lt;interactive&gt;:1:11: Not in scope: "\\\\"
  </code></pre>
  
  <p>Thanks for explanation where I make a mistake. </p>