Problem

In the Zumper mobile app, some text-processing utilities need to reverse user-entered strings. Write a function that takes a string and returns a new string with its characters in reverse order.

Formal Specification

• Input: A single string s
• Output: A string containing the characters of s in reverse order
• Function: Return the reversed string; do not print it

Examples

Example 1

• Input: s = "zumper"
• Output: "repmuz"
• Explanation: The characters are returned from the last position to the first.

Example 2

• Input: s = "Rent"
• Output: "tneR"
• Explanation: Uppercase and lowercase characters should be preserved exactly as they appear.

Constraints

• 0 <= len(s) <= 10^5
• s may contain letters, digits, spaces, and punctuation
• Return a new reversed string in Python

Aim for a linear-time solution. You may solve this with Python string slicing or by building the result manually with two pointers or iteration.