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  <meta charset=utf-8>
  <title>Cube — cbrt path</title>
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  <h1>Perfect cube (cbrt path)</h1>
  <p>Edit <code>inputNumber</code>, then <strong>Run</strong>.</p>
  <pre id=out></pre>
  <script>!function(){var t,n,e=(t=27,n=Math.round(Math.cbrt(t)),BigInt(n)**3n===BigInt(t)?"27 is a cube number.":"27 is not a cube number.");document.getElementById("out").textContent=e}()</script>
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JavaScript Cube Number — Math.cbrt + BigInt check (Try It)