Calculator App

A modern and feature-rich calculator app built using Flutter. This app provides a sleek and intuitive interface for performing various mathematical operations.

Features

• Basic Operations: Addition, Subtraction, Multiplication, and Division.
• Advanced Operations:
  • Calculate percentages.
  • Compute square roots.
• Responsive Design: Adapts seamlessly to different screen sizes.
• Calculation History: View your previous calculations.
• Error Handling: Clear and user-friendly error messages for invalid operations (e.g., division by zero).

Technologies Used

• Language: Dart
• Framework: Flutter
• UI Components: Material Design

Getting Started

Prerequisites

1. Install Flutter SDK from the official site.
2. Ensure you have an emulator or a physical device set up for development.

Installation

1. Clone the repository:

   git clone https://github.com/chathumiamarasinghe/Calculator_App.git

2. Navigate to the project directory:

   cd calculator-app

3. Run the app on an emulator or physical device:

   flutter run

4. How to Use

• Launch the app.
• Perform calculations by tapping the buttons for numbers and operations.
• Use the "√" button for square root and "%" for percentage.
• Tap the history icon (top-right) to view past calculations.
• Use "C" to clear the current input and "⌫" to delete the last digit or operator.

5. Code Overview

• The core functionality of the app is in the CalculatorScreen class, which manages:

• UI Rendering: Builds a responsive calculator interface.

• State Management: Handles user input, operations, and results dynamically.

• Error Handling: Displays error dialogs for invalid inputs.

Videos & Screenshots

Feature Demo Video - ios video

Feature Demo Video - Android video

Home Screen

History Screen

Error Screen

calculation Screen