All constructer of Scaffold class in flutter

 import 'package:flutter/material.dart';

class practiingflutter extends StatefulWidget {
  const practiingflutter({Key? key}) : super(key: key);

  @override
  State<practiingflutter> createState() => _practiingflutterState();
}

class _practiingflutterState extends State<practiingflutter> {
  @override
  Widget build(BuildContext context) {
    int _selectedIndex = 0;
    const List<Widget> _widgetOptions = <Widget>[
      Text('Home Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),
      Text('Search Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),
      Text('Profile Page', style: TextStyle(fontSize: 35, fontWeight: FontWeight.bold)),
    ];
    void _onItemTapped(int index) {
      setState(() {
        _selectedIndex = index;
      });
    }

    return Scaffold(
      // COnstructoer and properties of Scaffold
      appBar: AppBar(
        title: Text("hello world"),
      ),
      drawer: Drawer(
        elevation: 40.0,
        child: Column(
          children: [
            UserAccountsDrawerHeader(accountName: Text("Minhaj"),
          accountEmail: Text("minhajraza51694@gmail.com"),
      currentAccountPicture: CircleAvatar(
      backgroundColor: Colors.yellow,
      child: Icon(Icons.account_circle_outlined,size: 70,color: Colors.black45,),)),

        ListTile(
          title: Text('Main Account'),
          leading: Icon(Icons.account_circle_outlined),
        ),


            ListTile(
              title: Text('All mail inboxes'),
              leading: Icon(Icons.mail),
            ),
            Divider(
              height: 0.2,
            ),
            ListTile(
              title: Text('Primary'),
              leading: Icon(Icons.label_important_outlined),
            ),
            ListTile(
              title: Text('Social'),
              leading: Icon(Icons.sensor_occupied_sharp),
            ),

          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        elevation: 8.0,
        child: Icon(Icons.add),
        onPressed: (){
          print("BUtton is clicked");
        },

      ),
      backgroundColor: Colors.yellow,
      primary: true,// bu default bhi true hi rhta hai
     // persistentFooterButtons: [
       // ElevatedButton(onPressed: (){},
      //      child: Icon(Icons.add,color: Colors.white,)),
      //  ElevatedButton(onPressed: (){},
     //       child: Icon(Icons.clear,color: Colors.white,)),
     // ],
      bottomNavigationBar: BottomNavigationBar(
          items: const <BottomNavigationBarItem>[
            BottomNavigationBarItem(
                icon: Icon(Icons.home),
               label: "Home",
                backgroundColor: Colors.green
            ),
            BottomNavigationBarItem(
                icon: Icon(Icons.search),
                label: "Search",
                backgroundColor: Colors.yellow
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.person),
              label: "Profile",
              backgroundColor: Colors.blue,
            ),
          ],
          type: BottomNavigationBarType.shifting,
          currentIndex: _selectedIndex,
          selectedItemColor: Colors.black,
          iconSize: 30,
          onTap: _onItemTapped,
          elevation: 5
      ),

    );
  }
}