Flutter Calculator App

A modern, fully functional calculator app built with Flutter. This calculator provides all basic arithmetic operations with a clean, intuitive user interface.

Features

• ✨ Basic Operations: Addition, Subtraction, Multiplication, Division
• 🔢 Decimal Support: Handle floating point numbers
• 🔙 Backspace: Delete individual digits
• 🧹 Clear Function: Reset calculator state
• ⚠️ Error Handling: Proper handling of division by zero
• 🎨 Modern UI: Dark theme with orange accent colors
• 📱 Responsive Design: Works on all screen sizes

Screenshots

The calculator features a clean, modern interface with:

• Large, easy-to-read display
• Intuitive button layout
• Visual feedback for operations
• Dark theme for better user experience

Getting Started

Prerequisites

Make sure you have Flutter installed on your system. If not, follow the Flutter installation guide.

Installation

1. Clone this repository:

   git clone https://github.com/prabasajee/flutter_application_calculator.git
   cd flutter_application_calculator

2. Get dependencies:

   flutter pub get

3. Run the app:

   flutter run

Usage

The calculator is designed to be intuitive and easy to use:

1. Input Numbers: Tap number buttons (0-9) to enter values
2. Operations: Tap +, -, ×, ÷ for arithmetic operations
3. Decimal: Tap . to add decimal points
4. Calculate: Tap = to get the result
5. Clear: Tap C to reset everything
6. Backspace: Tap ⌫ to delete the last digit

Example Operations

• Simple addition: 5 + 3 = 8
• Decimal operations: 2.5 × 4 = 10
• Chained operations: 10 + 5 - 3 = 12

Technical Details

Architecture

• Language: Dart
• Framework: Flutter
• State Management: StatefulWidget with setState
• UI Pattern: Material Design

Key Components

• CalculatorApp: Main application widget
• CalculatorScreen: Main calculator interface
• _CalculatorScreenState: Manages calculator logic and state

File Structure

lib/
├── main.dart          # Main application entry point and calculator logic

Platform Support

This app runs on:

• 📱 Android
• 🍎 iOS
• 💻 Windows
• 🐧 Linux
• 🌐 Web
• 🖥️ macOS

Contributing

1. Fork the project
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Future Enhancements

Potential features to add:

• Scientific calculator functions
• History of calculations
• Themes and customization
• Memory functions (M+, M-, MR, MC)
• Keyboard input support

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Built with Flutter
• Inspired by modern calculator designs
• Material Design guidelines

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Made with ❤️ using Flutter