Flutter Calculator App

Overview

This Flutter application is a simple yet functional calculator that allows users to perform basic arithmetic operations, including addition, subtraction, multiplication, division, square root, and exponentiation. The user interface is designed to be user-friendly, featuring buttons for numerical input and operations.

Features

• Basic Arithmetic Operations: Supports addition, subtraction, multiplication, and division.
• Advanced Operations: Includes square root (√) and exponentiation (^).
• Clear and Backspace Functions: Users can clear the current input or remove the last character.
• Result Display: Shows results, including integers and decimal numbers, while handling infinite results appropriately.

Technologies Used

• Flutter: A UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.
• math_expressions: A package used to parse and evaluate mathematical expressions.
• string_validator: A package used for string validation, particularly for checking if a string can be parsed as an integer.

Getting Started

Prerequisites

• Flutter SDK
• Dart SDK

Code Structure

Main Components

• MyApp: The main StatefulWidget that holds the entire calculator application logic and UI.
• UI Layout: The layout consists of a text field for display and several rows of buttons for input.
• Button Actions: Each button has an onPressed method that updates the display accordingly.

Core Logic

• Input Handling: The app constructs the mathematical expression based on user input while ensuring proper formatting (e.g., handling parentheses).
• Evaluation: When the user presses the equals (=) button, the input string is parsed and evaluated using the math_expressions package. Results are then displayed in the text field.
• Error Handling: The app checks for infinite results and displays "Infinity" when applicable.

Usage

• Enter numbers and operations using the buttons.
• Use the clear (C) and clear entry (CE) buttons to manage your input.
• Press = to evaluate the expression, and the result will be displayed in the text field.

Screenshots

Contributing

Feel free to fork the repository and make contributions! Issues and pull requests are welcome.

License

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

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