title: Syntax error near unexpected token "0"
body: <p>Ok I know this has been posted a lot by bash newcomers but still, this is the program a teacher gave me, and it's not working properly.</p>
  <pre><code>#! /bin/bash
  echo &quot;month&quot;
  read month
  case $month in
     january)
         echo &quot;31&quot; ;;
     february)
         echo &quot;30&quot; ;;
     *)
         echo &quot;INVALID&quot; ;;
  esac
  exit(0)
  </code></pre>
  <p>The terminal gives me two errors,</p>
  <blockquote>
  <p>./shell2: line 15 : syntax error near unexpected token &quot;0&quot;</p>
  <p>./shell2: line 15 : `exit(0)'</p>
  </blockquote>
  <p>Could someone explain me one time for all?
  Thank you</p>