What is the role of the Scaffold widget in a Flutter application?

The Scaffold widget provides a basic Material Design structure for an app. It includes key UI components such as:

• appBar: The top app bar.
• bottomNavigationBar: The bottom navigation bar.
• floatingActionButton: The main action button.
• drawer: The side menu that slides out from the left or right edge.
• body: The main content area of the screen.
• snackBar: A popup message about an event.

Example usage:

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('My Scaffold App'),
        ),
        body: Center(
          child: Text('Hello, Scaffold!'),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () {
            // Action on press
          },
          child: Icon(Icons.add),
        ),
      ),
    );
  }
}