What is MaterialApp Material design is for Google Android material design which is used to create UI for Android.MaterialApp is a predefined class in a flutter that extends the Material Design class. It is likely the main or core component of flutter. We can access all the other components and widgets provided by Flutter SDK. It is a class that creates an instance of [WidgetsApp] . Text widget, AppBar widget, Scaffold widget, ListView widget, StatelessWidget, StatefulWidget, IconButton widget, TextField widget, and many more widgets that are accessed using MaterialApp class. For iOS, there is the Cupertino widgets class which I'll describe or discuss or explain in another article. What is Scaffold In Flutter Scaffold is a very useful and highly flexible class. Scaffold implements the basic material design layout structure. A Scaffold Widget provides a framework that implements the flutter app's basic material design visual layout structure. The developer can implement a wide...