🦲 Dart — Learn From Zero

Playground: DartPad — click, type, run.

What is Dart?

Dart is a client-optimized language by Google, best known for Flutter (cross-platform UI). Compiles to native or JS.

Cross-platform apps (Flutter)
Web frontends
CLI tools
Server-side

Run Online — No Install

Use the playground links above.

🟢 Beginner — Core Basics

Your First Program

dart

void main() {
  print("Hello, world!");
}

Entry point is main().

Variables & Types

dart

var name = "Ada";
int age = 36;
double height = 1.78;
bool isStudent = true;

Use var or explicit types.

If / Else

dart

var age = 18;
if (age >= 18) {
  print("Vote");
} else {
  print("Too young");
}

C-style control flow.

Loops

dart

for (var i = 0; i < 5; i++) print(i);
for (var f in ["a", "b"]) print(f);

Iterate with for-in.

Functions

dart

String greet(String name) => "Hello, $name!";

Arrow => for one-liners.

Lists & Maps

dart

var fruits = ["apple", "banana"];
fruits.add("cherry");
var m = {"name": "Ada", "age": 36};

Lists and maps are built-in.

🟡 Intermediate — Building Real Programs

Classes

dart

class Person {
  String name;
  Person(this.name);
}

Constructor shorthand this.name.

OOP

dart

abstract class Animal { void speak(); }
class Dog extends Animal { void speak() {} }

Inheritance with extends.

async/await

dart

Future load() async {
  return await Future.value("x");
}

Futures are like Promises.

Null Safety

dart

String? name;
print(name?.length ?? 0);

Sound null safety by default.

Collection Methods

dart

var even = [1,2,3,4].where((n) => n.isEven);

Functional operations.

🔴 Advanced — Pro Concepts

Mixins

dart

mixin Logger { void log() => print("log"); }
class A with Logger {}

Reuse implementations via with.

Generics

dart

class Box { T? value; }

Type parameters.

Streams

dart

Stream nums = Stream.periodic(Duration(seconds: 1), (i) => i);

Async sequences.

Isolates

dart

import "dart:isolate";
// spawn isolates for parallelism

Concurrency without shared memory.

What's Next?

Build a tiny project: Calculator, To-Do App, Weather Widget
Read the official docs and a good book
Solve Exercism exercises
Join a community & share your code

Practice daily for 20 minutes. Consistency > intensity.