Excel Sheet Column Title LeetCode solution in JavaScript

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/**
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 * @param {number} columnNumber
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 * @return {string}
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 */
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var convertToTitle = function (columnNumber) {
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  let ans = "";
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  while (columnNumber > 0) {
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    let n = --columnNumber % 26;
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    columnNumber = Math.floor(columnNumber / 26);
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    // console.log(String.fromCharCode(65+n),)
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    ans += String.fromCharCode(65 + n);
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  }
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  ans = ans.split("").reverse().join("");
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  return ans;
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};