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  <title>Lodash _.multiply — coercion</title>
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  <h1>_.multiply — undefined, null, strings</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var lines = [
        "_.multiply(undefined, undefined) => " + _.multiply(undefined, undefined),
        "_.multiply(undefined, 5)          => " + _.multiply(undefined, 5),
        "_.multiply(5, undefined)          => " + _.multiply(5, undefined),
        "",
        "_.multiply(null, null)            => " + _.multiply(null, null),
        "_.multiply(5, null)               => " + _.multiply(5, null),
        "",
        '_.multiply("5", 3)                => ' + _.multiply("5", 3),
        '_.multiply("5", "3")              => ' + _.multiply("5", "3"),
        '_.multiply("abc", 3)              => ' + _.multiply("abc", 3),
        "",
        "_.multiply(0, Infinity)            => " + _.multiply(0, Infinity),
        "_.multiply(-1, 0)                  => " + _.multiply(-1, 0) + "  (preserves -0 in IEEE-754)",
        "_.multiply(NaN, 5)                 => " + _.multiply(NaN, 5)
      ];
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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Lodash _.multiply — undefined, null, strings (Try It)