ass="n">isPrime</span></code>, <code class="language-c++ highlighter-rouge"><span class="n">getAge</span></code>).</p>
  </li>
  <li>
    <p><strong>Use named constants:</strong> Avoid sprinkling magic numbers throughout your code.  Instead declare a named <code class="language-c++ highlighter-rouge"><span class="k">const</span></code> value and use where that value is needed. This aids readability and gives one place to edit value when needed.</p>

    <div class="language-c++ good highlighter-rouge"><div 