title: Erlang: How to "Do Nothing" in true branch of if statement
body: <p>I have this <code>if</code> statement:</p>
  <pre class="lang-erlang prettyprint-override"><code>if 
      A /= B -&gt; ok;
      true   -&gt;
  end.
  </code></pre>
  <p>I want it to do nothing when <code>A == B</code>.</p>