title: Is there a shorter way to write compound 'if' conditions?
body: <p>Just <strong>instead</strong> of:</p>
  
  <pre><code>if  ( ch == 'A' || ch == 'B' || ch == 'C' || .....
  </code></pre>
  
  <p>For example, to do it <strong>like</strong>:</p>
  
  <pre><code>if  ( ch == 'A', 'B', 'C', ...
  </code></pre>
  
  <p>is there even a <strong>shorter</strong> way to summarize conditions?</p>