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<html>
<head>
  <meta charset="utf-8">
  <title>JS Alphabet Pattern 31 - Try It (Join)</title>
</head>
<body>
  <h1>Alphabet X Pattern (Join)</h1>
  <p>Edit the row count or loops, then click Run.</p>
  <pre id="output" style="font-family: monospace; white-space: pre;"></pre>
  <script>
    let rows = 5;
    rows = Math.max(1, Math.min(rows, 26));
    const width = 2 * rows - 1;
    const base = "A".charCodeAt(0);
    let result = "";

    for (let r = 0; r < rows; r++) {
      const ch = String.fromCharCode(base + r);
      const left = r;
      const right = width - 1 - r;
      const row = [];
      for (let c = 0; c < width; c++) {
        row.push((c === left || c === right) ? ch : " ");
      }
      result += row.join("") + "\n";
    }

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

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JavaScript Alphabet Pattern 31 (Try It - Join)