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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Swap with XOR</title>
</head>
<body>
  <h1>Swap using XOR (no temp)</h1>
  <p>Edit <code>a</code> and <code>b</code>, then <strong>Run</strong>.</p>
  <pre id="out"></pre>
  <script>
    (function () {
      var a = 5;
      var b = 10;
      var lines = [];
      lines.push("Before swapping: a = " + a + ", b = " + b);
      if (a !== b) {
        a ^= b;
        b ^= a;
        a ^= b;
      }
      lines.push("After swapping: a = " + a + ", b = " + b);
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
</body>
</html>

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JavaScript Swap Two Numbers — XOR Trick (Try It)