Anonymous function is called anonymous because it has no name. Anonymous function is always a good idea if you never need to call it from anywhere else, it has no name and you can’t call it from anywhere else.
//File Name: main.dart
import 'package:flutter/material.dart';
/*
* The arrow function allows us to create a simplified function consisting of a single expression.
* We can omit the curly brackets and the return keyword
*/
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
void answerQuestion() {
print('Answer chosen!');
}
@override
Widget build(BuildContext context) {
return MaterialApp(
/*
* A Scaffold Widget provides a framework which implements the basic material design visual
* layout structure of the flutter app.
*/
home: Scaffold(
appBar: AppBar(
title: Text('First Flutter App'),
),
body: Column(
children: <Widget>[
Text('The question'),
ElevatedButton(
child: Text('Answer1'),
//onPressed takes a function
onPressed: answerQuestion,
),
ElevatedButton(
child: Text('Answer2'),
onPressed: () => print('Answer2 chosen!'),
),
ElevatedButton(
child: Text('Answer3'),
onPressed: () {
//...multiline function body
print('Answer3 chosen');
},
),
],
),
),
);
} //build()
} //MyApp()
Output
Happy Coding!