title: sum two integer numbers in tcsh script
body: <p>I want to sum two integers in <code>tcsh</code>. I have seen how to do this in bash. 
  One variable is set by the queue manager, the other variable is a constant variable hardcoded in the script.
  I have tried</p>
  
  <pre><code>setenv II 199
  setenv AA 1
  echo $((${II}+${AA}))
  </code></pre>
  
  <p>but <code>illegal variable name</code></p>