Where is the Scaffold widget used in Flutter?

Scaffold is one of the fundamental widgets in Flutter that provides a standard structure for a material design application. It is used as the main container for a screen and includes elements such as:

• appBar: The top app bar, usually containing a title and actions.
• body: The main content of the screen.
• floatingActionButton: A floating action button.
• bottomNavigationBar: The bottom navigation bar.
• drawer: A slide-out side panel.
• bottomSheet: A modal sheet that slides up from the bottom.
• snackBar: A small popup message.

Scaffold is used on almost any screen where a standard material design interface is needed. It greatly simplifies UI creation by providing ready-made templates for common elements.

Example usage:

import 'package:flutter/material.dart';

class MyScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Screen'),
      ),
      body: Center(
        child: Text('Main content'),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          // Action on press
        },
        child: Icon(Icons.add),
      ),
    );
  }
}