HTML Code

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Number Pattern 15 - Try It</title>
</head>
<body>
  <h1>Alternating 0-1 Triangle</h1>
  <p>Edit <code>rows</code> and click Run.</p>
  <pre id="output"></pre>

  <script>
    const rows = 5;
    let result = "";

    for (let i = 1; i <= rows; i++) {
      let line = "";
      for (let j = i; j >= 1; j--) {
        line += j % 2;
      }
      result += line + "\n";
    }

    document.getElementById("output").textContent = result;
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

JavaScript Number Pattern 15 (Try It)