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千位分隔数

2022/12/20

https://leetcode.cn/problems/thousand-separator/

示例​

示例一​

输入：n = 987
输出："987"

示例二​

输入：n = 1234
输出："1.234"

示例三​

输入：n = 123456789
输出："123.456.789"

示例四​

输入：n = 0
输出："0"

题解参考​

模拟​

var thousandSeparator = function (n) {
  let count = 0;
  let ans = "";
  do {
    const cur = n % 10;
    ans += cur;
    n = Math.floor(n / 10);
    count += 1;
    if (count % 3 === 0 && n) {
      ans += ".";
    }
  } while (n);
  return ans.split("").reverse().join("");
};