title: make entire list to string in erlang
body: <p>I'm trying to do the following</p>
  
  <pre><code>S = lists:concat(A) ++ " " ++ [254,874] ++ "\n".
  </code></pre>
  
  <p>it gives me error message</p>
  
  <pre><code>** exception error: no match of right hand side value [51,50,52,51,53,54,53,54,55,54,54,53,52,51,32,254,874,10]
  </code></pre>
  
  <p>but it works fine for string values "[254,874]" </p>
  
  <p>how can I make [254,874] to "[254,874]"</p>