main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        appBar: AppBar(
          title: Text('Hello Column'),
        ),
        body: const Card(
          child: Padding(
            padding: EdgeInsets.all(16.0),
            child: Text('Hello World!'),
          ),
        ),
      ),
    );
  }
}