thousand-separator

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1556. Thousand Separator (Easy)

Given an integer n, add a dot (".") as the thousands separator and return it in string format.

 

Example 1:

Input: n = 987
Output: "987"

Example 2:

Input: n = 1234
Output: "1.234"

 

Constraints:

• 0 <= n <= 231 - 1

Related Topics

[String]

Hints

Hint 1

Scan from the back of the integer and use dots to connect blocks with length 3 except the last block.