This Flutter tutorial will teach you how to add two number.due to current techoligal demend we also created an app you friendly.The app is developed steps ahead of the existing world. While app development will be very useful for the future as well.
Main.dart
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | import 'package:addnumbers/addnumber.dart'; import 'package:flutter/material.dart'; void main() { runApp(MyApp()); } class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', debugShowCheckedModeBanner: false, theme: ThemeData( primarySwatch: Colors.blue, ), home: AddNumbers(), ); } } |
addnumbers.dart
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | import 'package:flutter/material.dart'; class AddNumbers extends StatefulWidget { final TextEditingController controller; const AddNumbers({ Key key, this.controller, }) : super(key: key); @override _AddNumbersState createState() => _AddNumbersState(); } class _AddNumbersState extends State<AddNumbers> { @override Widget build(BuildContext context) { var size = MediaQuery.of(context).size; final _num1 = TextEditingController(); final _num2 = TextEditingController(); final _tot = TextEditingController(); int result; int sum; return Scaffold( body: SafeArea( child: Container( padding:EdgeInsets.symmetric(horizontal: 15,vertical: 20), child: Column( children: [ Text("Add Two Numbers",style: TextStyle(fontSize: 30, color: Colors.black)), SizedBox(height: 15,), TextField( controller: _num1, decoration: InputDecoration( labelText: "Number 1", labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400), border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)) ), ), SizedBox(height: 15,), TextField( controller: _num2, decoration: InputDecoration( labelText: "Number 2", labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400), border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)) ), ), SizedBox(height: 15,), TextField( controller: _tot, decoration: InputDecoration( labelText: "Total", labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400), border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)) ), ), SizedBox(height: 15,), GestureDetector ( onTap: () { sum = int.parse(_num1.text) + int.parse( _num2.text); result = sum; _tot.text = result.toString(); }, child: Container( alignment: Alignment.center, height: size.height / 14, width: size.width, decoration: BoxDecoration(color: Colors.red, borderRadius: BorderRadius.circular(5)), child: Text("Add", style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),), ), ), ], ), ), ), ); } } |
I have attached the video tutorial below it will help you to do this step by step.
