title: Windows batch files: multiple if conditions
body: <p>Is there a way to say something like</p>
  
  <pre>
  if %1 == 1 or %1 == 2
  </pre>
  
  <p>in a batch file? Or, even better, if I could specify a set of candidate values like</p>
  
  <pre>
  if %1 in [1, 2, 3, 4, ... 20]
  </pre>