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<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=utf-8>
  <title>Perfect square loop check</title>
</head>
<body>
  <h1>Perfect square check</h1>
  <pre id=out></pre>
  <script>!function(){var t=[];t.push("Input: 16"),t.push(function(t){var e;if(t<0)return!1;for(e=0;e*e<=t;e++)if(e*e===t)return!0;return!1}(16)?"16 is a perfect square.":"16 is not a perfect square."),document.getElementById("out").textContent=t.join("\n")}()</script>
</body>
</html>

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JavaScript Perfect Square — Loop Check (Try It)