Minimum Value to Get Positive Step by Step Sum LeetCode solution in JavaScript

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var minStartValue = function (nums) {
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  var min = 1;
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  var sum = 0;
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  for (var i = 0; i < nums.length; i++) {
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    sum = sum + nums[i];
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    min = Math.min(min, sum);
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  }
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  if (min == 1) {
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    return min;
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  }
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  // add 1 to negative of min value obtained to keep the sum always positive
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  return -1 * min + 1;
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};