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Currency Converter Utility (NO API)

This utility does NOT use any external APIs. All exchange rates are entered manually for learning and experimentation.

This tool lets you convert between currencies using user-supplied exchange rates. You can add, edit, and view rates, and perform conversions between any two currencies.

Features

  • Add, edit, and remove exchange rates (currency pairs and rates)
  • Convert any amount between two currencies
  • View all stored rates
  • CLI interface (Python script)
  • Beginner-friendly: All code is commented for learning

Requirements

  • Python 3.7+
  • No external libraries required (uses only Python standard library)

Setup

  1. Copy currency_converter.py to your desired folder.
  2. Open a terminal in that folder.

Usage Workflow (Step-by-Step)

  1. Run the script: 
    python currency_converter.py
  2. Follow the menu prompts:
  3. Add, edit, or remove exchange rates
  4. Convert between currencies
  5. View all rates
  6. Exit when done.

No real market data is used. This is for learning only!

Example Session

Welcome to the Currency Converter!
1. Add rate
2. Edit rate
3. Remove rate
4. Convert currency
5. View all rates
6. Exit
Enter your choice: 1
Enter base currency (e.g., USD): USD
Enter quote currency (e.g., EUR): EUR
Enter exchange rate (1 USD = ? EUR): 0.92
Rate added!

Learning Notes

  • No API: All rates are managed in Python, so you can see and modify the logic yourself.
  • How does it work? The code is structured with classes and functions, with comments explaining each step.
  • How can you extend it? Try adding support for historical rates, or plotting exchange rate trends!

License

MIT