Hello World App

import 'package:flutter/material.dart';

void main() {
  runApp(const HelloWorldApp());
}

class HelloWorldApp extends StatelessWidget {
  const HelloWorldApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Hello World',
      home: Scaffold(
        appBar: AppBar(title: const Text('Hello World')),
        body: const Center(
          child: Text('Hello from Flutter!', style: TextStyle(fontSize: 28)),
        ),
      ),
    );
  }
}