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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Number Pattern 58 - Try It</title>
</head>
<body>
  <h1>Centered Hollow Number Diamond</h1>
  <p>Edit n and click Run.</p>
  <pre id="output"></pre>
  <script>
    const n = 5;
    let result = "";
    function makeRow(i) {
      let line = " ".repeat(n - i);
      if (i === 1) return line + "1";
      return line + i + " ".repeat(2 * i - 3) + i;
    }
    for (let i = 1; i <= n; i++) result += makeRow(i) + "\n";
    for (let i = n - 1; i >= 1; i--) result += makeRow(i) + "\n";
    document.getElementById("output").textContent = result;
  </script>
</body>
</html>

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JavaScript Number Pattern 58 (Try It)