🧮 Python Calculator Project (CLI + GUI + PRO)

A Python-based calculator project implemented in three different versions:

• 💻 CLI Version (Command Line Interface)
• 🖥️ GUI Version (Tkinter Basic)
• 🚀 GUI PRO Version (Advanced Scientific Calculator)

This project demonstrates the evolution from a simple calculator to a feature-rich GUI application.

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📌 Project Overview

This project was created to practice:

• Python fundamentals
• Functions & modular programming
• Tkinter GUI development
• Event-driven programming
• Scientific calculations using Python
• GUI design improvement

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✨ Features

💻 CLI Version

• Addition
• Subtraction
• Multiplication
• Division
• Menu-driven interface
• Exception handling

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🖥️ GUI Version

• Input fields for numbers
• Operation buttons
• Result display
• Simple user interface

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🚀 GUI PRO Version

Advanced calculator features:

• Scientific functions
• Calculation history
• Keyboard input support
• Enhanced UI
• Full calculator keypad
• Clear button
• Better user interaction

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🛠️ Technologies Used

• Python 3
• Tkinter (GUI Development)
• Math Module
• Functions & Logic
• Git & GitHub

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📂 Project Structure

python-calculator-project/
│
├── cli_calculator.py
├── calculator_gui.py
├── calculator_pro_gui.py
├── calculator_pro_gui.png
├── calculator_pro_terminal.png
└── README.md

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🖼️ Project Screenshots

🖥️ GUI PRO Calculator

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💻 CLI Calculator

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▶️ How to Run

✅ Run CLI Version

python cli_calculator.py

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✅ Run GUI Version

python calculator_gui.py

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✅ Run GUI PRO Version

python calculator_pro_gui.py

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📋 CLI Example

Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide

Enter choice: 1
Enter first number: 5
Enter second number: 3

Result: 5 + 3 = 8

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📚 Learning Outcomes

By completing this project, I practiced:

• Python programming fundamentals
• Functions and modular code
• Tkinter GUI development
• Event-driven programming
• Scientific calculations using math module
• Error handling
• User interface design

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🚀 Future Improvements

• Dark Mode UI
• History export
• Voice input
• Keyboard shortcuts
• Advanced mathematical graphs
• Memory functions

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👩‍💻 Author

Saloni Tiwari
Python & Data Science Student

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📊 Project Level

🟢 CLI → Beginner
🟡 GUI → Beginner+
🔵 GUI PRO → Intermediate

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⭐ This project is great for beginners transitioning from CLI applications to GUI-based real-world Python applications.