Build a Calculator App in Flutter | Learn StatefulWidget, setState() & GridView.builder | Flutter Beginner Course Episode 4
━━━━━━━━━━━━━━━━━━━━ 📖 Introduction In this Flutter Beginner Course Episode 4, we will build a modern Calculator App from scratch using Flutter and Dart. This real-world project introduces one of the most important Flutter concepts—state management using StatefulWidget and setState(). Instead of creating a static user interface, you will learn how to build an interactive application that responds instantly to user input while maintaining clean, reusable, and professional code. Throughout this tutorial, we will design a premium Material 3 calculator interface with a responsive layout, live display updates, modern button grid, mathematical operators, decimal support, delete functionality, clear button, and real-time calculations. The application is designed to look professional while remaining beginner-friendly, making it an excellent project for developers who are starting their Flutter journey. During the development process, you will learn how StatefulWidget ma...