1.Installing Required Software
a. Installing Flutter SDK

• Download Flutter SDK:
  Go to Flutter's official website: Flutter SDK.
  Download the Flutter SDK appropriate for your operating system.

• Installation:

  • Windows: Extract the downloaded ZIP file to a directory of your choice (e.g., C:\src\flutter).

  • macOS: Use the terminal to extract the ZIP file and add flutter/bin to your PATH.

  • Linux: Extract the ZIP file and add the flutter/bin directory to your PATH.

• Setting PATH:
  After setting the PATH, check if Flutter SDK is installed by typing flutter in the terminal/command prompt.

b. Installing Android Studio and Android SDK

• Flutter supports development for both Android and iOS platforms, so you’ll also need to install Android Studio.

• Download and install Android Studio from here.

• Complete Android SDK and Android Emulator installations from Android Studio’s "SDK Manager" section.

c. Xcode for iOS Development (macOS Only)

• If you’re on macOS, download and install Xcode from the App Store for iOS development.

• Once Xcode is installed, configure it by running the following command in the terminal: sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer.

• iOS simulators can also be installed within Xcode.

d. Development Environment with VS Code or Android Studio

• Optionally, you can use VS Code. Download and install VS Code.

• Install the Flutter and Dart extensions.

• Alternatively, you can use Android Studio, which also works with the Dart and Flutter plugins.

e. Checking with Flutter Doctor

• Type flutter doctor in the terminal or command prompt to check if the Flutter setup is complete. Flutter Doctor will notify you of any missing components.

2.Creating a New Flutter Project
Creating a New Project in Terminal:

• Open a terminal or command prompt and run the following command:
  flutter create hello_world

• This command will create a new Flutter project named hello_world.

Navigating to the Project Directory:

Navigate to the project directory:
cd hello_world

Opening the Project in a Code Editor:

You can open the project in VS Code or Android Studio. If using VS Code:
code .

Running Your First Flutter App
a. Default Flutter "Counter" Demo Application

• Flutter automatically creates a "Counter" demo application, a simple app that increments a counter each time you press a button.

b. Running the Application

• Starting an Android Emulator or iOS Simulator:
  Start a virtual device (emulator) in Android Studio or Xcode. To see a list of devices in the terminal, type:
  flutter devices

• Running the Application:
  Run the Flutter application with the following command:
  flutter run

• Your app will run on the selected device.

4.Creating Your First "Hello World" Application

To quickly create a "Hello World" app in Flutter, follow these steps:

Editing the Code:

• Open lib/main.dart and replace its contents with the following code:
  
  import 'package:flutter/material.dart';

void main() {

  runApp(MyApp());

}

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return MaterialApp(

      home: Scaffold(

        appBar: AppBar(

          title: Text('Hello World App'),

        ),

        body: Center(

          child: Text('Hello, World!'),

        ),

      ),

    );

  }

}

• This code creates a simple app displaying "Hello, World!" at the center of the screen.

Running the Application Again:

• Run the app in the terminal with:
  
  flutter run