Reverse String Without Built-ins

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Problem

Write a function that reverses a string without using built-in reverse methods or slicing shortcuts.

The function should return a new string with the characters in reverse order. Assume the input is a standard Python string and may contain letters, digits, spaces, and punctuation.

Formal Specification

Input: A single string s
Output: A string containing the characters of s in reverse order
Rules: Do not use built-in reverse helpers such as reversed(), ''.join(reversed(...)), or slicing with a negative step

Constraints

0 <= len(s) <= 10^5
s may contain printable ASCII characters
Do not use built-in reverse helpers or negative-step slicing

Function Signature

def reverse_string(s):

Your solutionPython 3

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