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  <title>Composite — sqrt bound + range</title>
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  <h1>Composites from 1 to 10</h1>
  <p>Uses <code>i &lt;= n / i</code> trial division. Edit the loop bounds to experiment.</p>
  <pre id=out></pre>
  <script>!function(){function n(n){if(n<=1)return 0;for(var r=2;r<=n/r;r++)if(n%r==0)return 1;return 0}var r=[];r.push("Composite numbers in the range 1 to 10 are: ");var t,e=[];for(t=1;t<=10;t++)n(t)&&e.push(String(t));r.push(e.join(" ")),document.getElementById("out").textContent=r.join(String.fromCharCode(10))}()</script>
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JavaScript Composite Number — √n helper and range 1–10 (Try It)