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What is Flutter?

Hey there, awesome learners! Have you heard about Flutter? It’s this amazing thing made by Google back in 2017. And guess what? It’s totally free! Flutter helps cool people like developers make apps for phones. The cool part is, that they only need to write the code once, and it works on iPhones, Androids, the web, and even desktops!

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Cool Stuff in Flutter

So, Flutter has two important parts:

  1. The Software Magic: Flutter gives developers tools to make their apps. These tools are like a superhero team that helps make apps work on iPhones and Androids.
  2. The Widget World: Flutter has a special trick called widgets. They’re like building blocks for apps. Think of buttons, text boxes, and sliders—Flutter has them all. Plus, you can make them look and act exactly how you want!

Widgets: The Cool Building Blocks

In Flutter, everything is a widget. It’s like a family tree of widgets! Each widget can have little widget children, and those can have their own children too. This makes designing apps super easy. There are two types of widgets: the ones that don’t change (Stateless) and the ones that do (Stateful).

Widgets Example

Dart: The Code Language

When Flutter heroes make apps, they talk in a special language called Dart. Google made Dart in 2011, and it’s gotten even better since then. Dart makes things look pretty and work well on phones and the web.

Let’s Play with Code!

import 'dart:io';
void main(){
   // Tell me a number, quick!
    int rows = int.parse(stdin.readLineSync());
    for(int i = 0 ; i< rows; i++)
        for(int j = 0; j<=i;j++)
            // Drawing * on the screen
            stdout.write('* ');

Flutter’s Cool Layouts

Making things look awesome is important. Flutter has special tools for arranging stuff in apps. Let’s check them out:

  • Container: It’s like a magic box you can shape and style!
  • Stack: Stack your stuff like a tower of blocks.
  • Row: Put things in a line, side by side.
  • Column: Stack things up, one on top of the other.

Why Choose Flutter?

Flutter is like a superhero for developers:

  • Super Phone Powers: It makes apps for iPhones and Androids with just one code.
  • Widgets to Wow: Flutter has tons of cool stuff you can use to make apps look great.
  • Speedy Gonzales: Flutter apps run super fast because they talk directly to phones.
  • Free and Open: Flutter is like a gift from Google to everyone. Developers make it even better together.
  • Testing Made Easy: Flutter makes sure your app works perfectly before you show it to the world.
  • Fast and Not Furious: You save time and money with Flutter’s magic one-code-for-all trick.

Flutter is your buddy for making awesome apps. It works on phones, the web, and even big computers. Developers love it because it’s fast, friendly, and free. So, if you’re into making cool things that everyone can use, Flutter is your secret weapon!


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