Leetcode 1660 Solution

This article provides solution to leetcode question 1660 (thousand-separator)
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https://leetcode.com/problems/thousand-separator

Solution

class Solution:
    def thousandSeparator(self, n: int) -> str:
        ans = ""
        str_n = str(n)

        for i, ch in enumerate(str_n):
            if (len(str_n) - i) % 3 == 0 and i != 0:
                ans += '.'
            ans += ch

        return ans