344. Reverse String

Write a function that takes a string as input and returns the string reversed.Example:
Given s = "hello", return "olleh".class Solution {
public:
string reverseString(string s) {
int i = 0, j = s.length() - 1;
while(i < j){
swap(s[i], s[j]);
i++;
j--;
}
return s;
}
};