Flutter how to programmatically exit the app

 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 
 void main() {
   runApp(HomeScreen());
 }
 class HomeScreen extends StatelessWidget {
   const HomeScreen({super.key});
   void closeAppUsingSystemPop() {
     SystemChannels.platform.invokeMethod('SystemNavigator.pop');
   }
   void closeAppUsingExit() {
     exit(0);
   }
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       theme: ThemeData(primarySwatch: Colors.green),
       home: Scaffold(
         appBar: AppBar(
           title: Text('Exit From the App'),
         ),
         body: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Image.asset('assets/images/company_logo.png'),
                ElevatedButton(
                    onPressed: () {
                      closeAppUsingSystemPop();
                    },
                    child: Text('Exit using System Navigator')),
                ElevatedButton(
                    onPressed: () {
                      closeAppUsingExit();
                    },
                    child: Text('Exit using Exit 0')),
               ],
             )),
       ),
     );
   }
 }