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Lab Ex 1

This document contains a Flutter application that implements a simple counter app. The app increments a counter by 4 each time a button is pressed. It features a basic user interface with an AppBar and a centered column displaying the counter value and a button.

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31 views2 pages

Lab Ex 1

This document contains a Flutter application that implements a simple counter app. The app increments a counter by 4 each time a button is pressed. It features a basic user interface with an AppBar and a centered column displaying the counter value and a button.

Uploaded by

IT Unit
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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import 'package:flutter/material.

dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Countup by 4 App',
home: CounterScreen(),
);
}
}
class counterScreen extends statefulWidget {
@override
_CounterScreenState createState() => _CounterScreenState();
}
class _CounterScreenState extends State {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter = 4; // Increment by 4
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Count up by 4'),
),
body: Center(
child: Column(
MainAxisAlignment: MainAxisAlignment.center,
children: [
Text(
'Counter:',
style: TextStyle(fontSize: 24),
),
Text(
'$_counter',
style: TextStyle(fontSize: 48, fontWeight: FontWeight.bold),
),
SizedBox(height: 20),
ElevatedButton(
onPressed: _incrementCounter,
child: Text('Count up by 4'),
),
],
),
),
);
}
}

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