Arranging Coins LeetCode solution in JavaScript

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var arrangeCoins = function (n) {
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  if (n === 1) return n;
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  for (let i = 1; i <= n; i++) {
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    if (n < Math.floor((i * (i + 1)) / 2)) {
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      return i - 1;
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    }
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  }
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};