when you run flutter create project_name, Flutter creates a big folder structure that can feel overwhelming at first. Don’t worry , we’ll go from basics and I’ll explain which files are important, and we’ll build step by step in VS Code.

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Step 1: Understanding Flutter Project Structure

When you create a project (flutter create hello_world), you’ll see folders like:

hello_world/
 ├── android/        # Native Android code (Java/Kotlin)
 ├── ios/            # Native iOS code (Swift/Obj-C)
 ├── web/            # For web apps
 ├── lib/            # Your main Flutter code (MOST IMPORTANT )
 ├── test/           # For writing tests
 ├── pubspec.yaml    # Project settings + dependencies
 └── README.md

As a beginner, you mostly work in lib/ and pubspec.yaml.
The rest is handled automatically by Flutter.

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Step 2: The Important File – lib/main.dart

This is where your app starts.
Inside you’ll see something like:

import 'package:flutter/material.dart';

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

• main() → starting point of every Dart program.
• runApp() → tells Flutter to draw your app on the screen.
• MyApp → root widget of your app.

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Step 3: Simplest Hello World App

Let’s make the minimum code (ignore all other files for now):

import 'package:flutter/material.dart';

void main() {
  runApp(
    const Center(
      child: Text(
        'Hello World ',
        textDirection: TextDirection.ltr,
      ),
    ),
  );
}

This is the most basic Flutter app:

• Center → places text in the center.
• Text → displays “Hello World “.
• textDirection → required in raw Flutter apps.

If you run this, you’ll see only Hello World on screen.

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Step 4: Using MaterialApp (For Modern Apps)

Usually, we wrap the app inside MaterialApp for Android-like look:

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text("My First App")),
        body: Center(
          child: Text(
            "Hello Flutter ",
            style: TextStyle(fontSize: 28, fontWeight: FontWeight.bold),
          ),
        ),
      ),
    );
  }
}

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Step 5: What You Should Focus On First

1. lib/main.dart → write your UI here.
2. Widgets (Text, Container, Row, Column, Image, Button).
3. pubspec.yaml → to add dependencies (like http, firebase, etc).