[Easy Task] Add comments to existing code for better understanding

### Description of the idea

Add clear, helpful comments to the code to improve readability for beginners. Focus on explaining logic, functions, loops, and conditionals.

✅ Tasks:

- Review the code

- Add meaningful comments (avoid obvious ones)

- Ensure code runs after changes

### Add several screenshots or links related to the idea (if applicable)

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### Add more details about the idea

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The issue names no files, tests, or entry points. Start by reviewing the repository to identify a focused area where comments would explain non-obvious logic, then confirm the code still runs after the comments are added. Done means the selected code has meaningful comments without obvious narration and remains runnable.

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