hellostateless.dart

hellostateless.dart

import 'package:flutter/material.dart';
void main() {
  runApp(new HelloWorld());
}
class HelloWorld extends StatelessWidget {
  String mytext = "Hello World";

   void goodbyeText(){
   this.mytext = "GoodBye World";
   print("inside goodbye text")  ;
 }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Hello World Example'),
        ),
        body: GestureDetector(
          onTap: goodbyeText,
          child:Center(
          child: Text(mytext),
        ),
      ),
      ),
    );
  }
}