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  <title>Lodash _.round — basics</title>
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  <h1>_.round — positive &amp; negative precision</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var lines = [
        "_.round(4.006)                  => " + _.round(4.006),
        "_.round(4.006, 2)               => " + _.round(4.006, 2),
        "_.round(4060, -2)               => " + _.round(4060, -2),
        "_.round(5.678, 1)               => " + _.round(5.678, 1),
        "_.round(3.14159265358979, 5)   => " + _.round(3.14159265358979, 5),
        "_.round(1234.56789, 2)          => " + _.round(1234.56789, 2),
        "_.round(9876543210.123, -5)    => " + _.round(9876543210.123, -5),
        "_.round(1234, -3)               => " + _.round(1234, -3)
      ];
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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Lodash _.round — positive & negative precision (Try It)