Flutter Center widget center aligns its child widget within itself, along vertical and horizontal axes.

Syntax

                  Center(
                    child: someWidget,
                  )

                  

                

                import 'package:flutter/material.dart';
 
 void main() => runApp(const MyApp());
  
 class MyApp extends StatelessWidget {
   const MyApp({Key? key}) : super(key: key);
  
   static const String _title = 'Flutter Tutorial';
  
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       title: _title,
       home: Scaffold(
         appBar: AppBar(title: const Text(_title)),
         body: const MyStatefulWidget(),
       ),
     );
   }
 }
  
 class MyStatefulWidget extends StatefulWidget {
   const MyStatefulWidget({Key? key}) : super(key: key);
  
   @override
   State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
 }
  
 class _MyStatefulWidgetState extends State<MyStatefulWidget> {
   @override
   Widget build(BuildContext context) {
     return const Center(
       child: Text('Hello World', style: TextStyle(fontSize: 30),),
     );
   }
 }
                

Center()