[LeetCode] 709. To Lower Case_Easy

Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.

Example 1:

Input: "Hello"
Output: "hello"

Example 2:

Input: "here"
Output: "here"

Example 3:

Input: "LOVELY"
Output: "lovely"

Code

class Solution:
    def toLower(self, s):
        ans = ""
        for c in s:
            if ord('A') <= ord(c) <= ord('Z'):
                ans += chr(ord('a') + ord(c) - ord('A'))
            else:
                ans += c
        return ans