title: Erlang arithmetic operations on ets:select result
body: <p>I have an ets table which you can imagine there are two columns, "Key" and Value. Value is an integer.</p>
  
  <p>When I tried:</p>
  
  <pre><code> Ans = ets:select(Table_name, MS),
   Ans + 1.
  </code></pre>
  
  <p>where Ans equals to the expected Value.</p>
  
  <p>I got a error:</p>
  
  <pre><code> ** exception error: an error occurred when evaluating an arithmetic expression
  </code></pre>
  
  <p>Can I not do any arithmetic operation on the ets:select return value?</p>