🧮 Tkinter Calculator (v2)

An enhanced and visually polished calculator built with Python's Tkinter library — version 2 introduces a modern color scheme, improved input validation, and a live expression history display.

Calculator UI Preview

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🚀 Features

• Basic arithmetic operations: +, -, ×, ÷
• Live expression preview (history-like feature)
• Error handling for invalid inputs (e.g., ⚠️ Error)
• AC (All Clear) and CE (Clear Entry) buttons
• Prevents alphabetical input in the entry field
• Enhanced color scheme and cleaner UI layout

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🛠 Tech Stack

• Language: Python 3
• GUI Library: Tkinter (comes built-in with Python)

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📥 How to Run

1. Make sure Python is installed on your system.
2. Clone this repository:

git clone https://github.com/KrishnaSingh-bit/Calculator-tkinter.git

3. Navigate to the project folder and run:

cd tkinter-calculator
python main.py

4. Verify if Tkinter is available:

python -m tkinter

💡 Also, ensure image.png (the icon) and screenshot.png are placed correctly in the same directory.

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📁 Project Structure

📁 tkinter-calculator/
 ┣ 📄 main.py      # Main app file (v2)
 ┣ 📄 README.md          # Project readme (this file)
 ┣ 📷 screenshot.png     # UI image
 ┗ 🖼 image.png           # Window icon for the app

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💡 What I Learned

• Managing Tkinter widgets and grid-based layouts
• Input validation using validatecommand
• Handling errors with try/except inside a GUI context
• Using StringVar() and .trace() for real-time updates
• Making cleaner, user-friendly UI designs

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✨ Future Ideas

• Keyboard input bindings for faster input
• Add scientific operations (e.g., sin, cos, log)
• Responsive design or fullscreen toggle
• Theme toggle: light/dark modes
• Exporting expression history

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📜 License

This project is open-source under the MIT License.

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🙋‍♂️ About Me

Hi! I'm Krishna Singh, a student and aspiring Computer Science engineer.
This is version 2 of my calculator GUI project — feel free to try it out or share feedback!