Student Marks Calculation in Flutter

This Flutter tutorial will teach you how to  do the Student Marks Calculation.due to current techoligal demend we also created an app user 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

import 'package:flutter/material.dart';
import 'package:studentmarks/studentmarks.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
 
        primarySwatch: Colors.blue,
      ),
      home: StudentMarks(),
    );
  }
}

studentmarks.dart

import 'package:flutter/material.dart';

class StudentMarks extends StatelessWidget {

final TextEditingController controller; 

  const StudentMarks({ Key key,this.controller }) : super(key: key);

  @override
  Widget build(BuildContext context) {
     final _marks1 = TextEditingController();
      final _marks2 = TextEditingController();
      final _marks3 = TextEditingController();

      final _tot= TextEditingController();

      final _avg= TextEditingController();
       final _grade= TextEditingController();

      
      int result;
      double average;
     
      int sum;


    var size = MediaQuery.of(context).size;


    return Scaffold(
      
      body: SafeArea(
        child: SingleChildScrollView(
          child: Container(
              padding:EdgeInsets.symmetric(horizontal: 15,vertical: 20),
              child: Column(
                children: [
                  Text("Student Marks Calcuation",style: TextStyle(fontSize: 30, color: Colors.red)),
                    SizedBox(height: 15,),
                  TextField(
                           controller: _marks1,
                           decoration: InputDecoration(
                             labelText: "Marks 1",
                             labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400),
                             border: OutlineInputBorder(borderRadius: BorderRadius.circular(10))
                           ),
                ),
                  SizedBox(height: 15,),
                 TextField(
                         controller: _marks2,
                           decoration: InputDecoration(
                             labelText: "Marks 2",
                             labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400),
                             border: OutlineInputBorder(borderRadius: BorderRadius.circular(10))
                           ),
                ),
                    SizedBox(height: 15,),
              TextField(
                           controller: _marks3,
                           
                           decoration: InputDecoration(
                             labelText: "Marks 3",
                             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,),
                  TextField(
                           controller: _avg,
                           decoration: InputDecoration(
                             labelText: "Avg",
                             labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400),
                             border: OutlineInputBorder(borderRadius: BorderRadius.circular(10))
                           ),
                ),
                 SizedBox(height: 15,),
                  TextField(
                          controller: _grade,
                           decoration: InputDecoration(
                             labelText: "Grade",
                             labelStyle: TextStyle(fontSize: 15,color: Colors.grey.shade400),
                             border: OutlineInputBorder(borderRadius: BorderRadius.circular(10))
                           ),
                ),
                 GestureDetector
               ( 
               onTap: ()
               {
                     sum = int.parse(_marks1.text) + int.parse( _marks2.text)+ int.parse( _marks3.text);
                     result = sum;
                     _tot.text = result.toString();

                     average = result/3;


                    _avg.text = average.toString();

                    if(average > 50)
                    {
                      
                      _grade.text = "Pass";
                    }
                    else
                    {
                       _grade.text = "Fail";
                    }

               },
                  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.