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  <title>Lodash _.multiply — reduce</title>
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  <h1>_.multiply — reduce, factorial, BigInt</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      function factorial(n) {
        return Array.from({ length: n }, function (_v, i) { return i + 1; }).reduce(_.multiply, 1);
      }
      var lines = [
        "[2, 3, 4].reduce(_.multiply, 1) => " + [2, 3, 4].reduce(_.multiply, 1),
        "[].reduce(_.multiply, 1)        => " + [].reduce(_.multiply, 1),
        "factorial(5)                     => " + factorial(5),
        "factorial(10)                    => " + factorial(10)
      ];
      try {
        lines.push("_.multiply(2n, 3n)               => " + _.multiply(2n, 3n));
      } catch (err) {
        lines.push("_.multiply(2n, 3n) THREW: " + err.message);
      }
      lines.push("native 2n * 3n                  => " + (2n * 3n));
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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Lodash _.multiply — reduce, factorial, BigInt (Try It)