https://leetcode.com/problems/to-lower-case/description/
--
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"
'a' - 'A' = 32
class Solution {
public:
string toLowerCase(string str) {
int n = str.length();
for (int i = 0; i < n; i++) {
if (str[i] >= 'A' && str[i] <= 'Z') {
str[i] += 32;
}
}
return str;
}
};
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