Separate business logic from UI with reactive state management
BLoC (Business Logic Component) is an architectural design pattern for structuring Flutter applications. It separates business logic from the UI layer using streams and event-driven architecture. BLoCs are classes that accept events (user actions), process them, and emit states (UI data). The pattern promotes testability, reusability, and scalability in large Flutter apps. - Separation of concerns: Business logic lives outside widgets; easy to test independently