HTML Code

<!DOCTYPE html>
<html>
<body>
<script>
const n = 5;

for (let i = n; i >= 1; i--) {
  for (let j = 1; j <= i; j++) {
    document.write(j);
  }
  document.write("<br>");
}
</script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

JavaScript Number Pattern 1 (Try It — document.write)