Reverse String

Write a function that takes a string as input and returns the string reversed.

Example: Given s = "hello", return "olleh".

class Solution(object):
    def reverseString(self, s):
        """
        :type s: str
        :rtype: str
        """
        return s[::-1]

With out using [::-1]

class Solution(object):
    def reverseString(self, s):
        """
        :type s: str
        :rtype: str
        """
        res = [s[i] for i in reversed(range(len(s)))]
        return ''.join(res)