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<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Even — bitwise</title>
</head>
<body>
  <h1>Bitwise parity check</h1>
  <p>Edit the values in <code>tests</code>, then click <strong>Run</strong>.</p>
  <pre id="out"></pre>
  <script>
    (function () {
      function isEvenBitwise(number) {
        return (number & 1) === 0;
      }
      var tests = [10, 11, 0, -4];
      var lines = [];
      for (var i = 0; i < tests.length; i++) {
        var n = tests[i];
        var label = isEvenBitwise(n) ? "even" : "odd";
        lines.push(n + ": " + label);
      }
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
</body>
</html>

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JavaScript Even Number — Bitwise check (Try It)