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<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=utf-8>
  <title>Even — single n</title>
</head>
<body>
  <h1>Single even check</h1>
  <p>Edit <code>number</code> in the script, then click <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){var n=function(n){return n%2==0}(10)?"10 is an even number.":"10 is not an even number.";document.getElementById("out").textContent=n}()</script>
</body>
</html>

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JavaScript Even Number — Single check (Try It)