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  <title>LCM — three numbers</title>
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  <h1>LCM of three numbers</h1>
  <p>Edit arrays in <code>tests</code>, then click <strong>Run</strong>.</p>
  <pre id="out"></pre>
  <script>
    (function () {
      function findGcd(a, b) {
        a = Math.abs(a);
        b = Math.abs(b);
        while (b !== 0) {
          var temp = b;
          b = a % b;
          a = temp;
        }
        return a;
      }
      function findLcm(a, b) {
        if (a === 0 || b === 0) {
          return 0;
        }
        var g = findGcd(a, b);
        return Math.abs((a / g) * b);
      }
      function lcmMany(nums) {
        var result = 1;
        var i;
        for (i = 0; i < nums.length; i++) {
          result = findLcm(result, nums[i]);
        }
        return result;
      }
      var tests = [[4, 6, 8], [12, 18, 9]];
      var lines = [];
      var i;
      for (i = 0; i < tests.length; i++) {
        lines.push(String(lcmMany(tests[i])));
      }
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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JavaScript LCM — Three Numbers (Try It)