Write a function that reverses a string. Do not use built-in reverse methods.
Input: s = 'hello' Output: 'olleh' Input: s = 'abcde' Output: 'edcba'
Unlock hints progressively — start gentle, go deeper only if needed.
Level 1: Gentle Nudge
A subtle direction
Level 2: Approach
The algorithm to use
Level 3: Detailed
Step-by-step guidance
to save progress and use AI features