HTML Code

<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=utf-8>
  <title>Composite — n/2 trial</title>
</head>
<body>
  <h1>Check composite (n/2 bound)</h1>
  <p>Edit <code>num</code>, then <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){var t=function(t){if(t<=1)return!1;for(var n=2;n<=t/2;n++)if(t%n==0)return!0;return!1}(12)?"12 is a composite number.":"12 is not a composite number.";document.getElementById("out").textContent=t}()</script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

JavaScript Composite Number — trial to n/2 (Try It)