HTML Code

<!DOCTYPE html>
<html>
<head>
  <meta charset=utf-8>
  <title>JS Alphabet Pattern 20 - Try It (Browser)</title>
  <style>div.cell{display:inline-block;text-align:center;width:13px}</style>
</head>
<body>
  <h1>Right-aligned (document.write)</h1>
  <p>Edit the loops, then click Run.</p>
  <script>const A=65,top=69;for(let e=A;e<=69;e++){for(let t=69;t>=A;t--)t>e?document.write('<div class="cell"></div>'):document.write('<div class="cell">'+String.fromCharCode(t)+"</div>");document.write("<br>")}</script>
</body>
</html>

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JavaScript Alphabet Pattern 20 (Try It — Browser)