# ---
# title: 1556. Thousand Separator
# id: problem1556
# author: Tian Jun
# date: 2020-10-31
# difficulty: Easy
# categories: String
# link: <https://leetcode.com/problems/thousand-separator/description/>
# hidden: true
# ---
# 
# 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"
#     
# 
# **Example 3:**
# 
#     
#     
#     Input: n = 123456789
#     Output: "123.456.789"
#     
# 
# **Example 4:**
# 
#     
#     
#     Input: n = 0
#     Output: "0"
#     
# 
# 
# 
# **Constraints:**
# 
#   * `0 <= n < 2^31`
# 
# 
## @lc code=start
using LeetCode

## add your code here:
## @lc code=end
