02

    Dart Basics for Flutter

    Beginner • 12 min • Video Lesson

    Complete tasks and quiz to finish this lesson

    Video Player Placeholder (h1D1Y_I_5Y8)

    Learning Objectives

    • Understand Dart types, variables, final/const, and type inference
    • Master sound null safety syntax and how it protects mobile apps from crashes
    • Learn OOP paradigms in Dart including classes, constructors, and mixins
    • Write asynchronous logic using Future, Stream, and async/await syntax

    What You'll Learn

    1. Basic Dart syntax, functions, and string interpolation
    2. Sound null safety: working with nullable types and operators
    3. Object-Oriented Programming: classes, naming parameters, and extensions
    4. Asynchronous programming: handling streams and async futures

    Key Concepts

    Dart
    Null Safety
    OOP
    Async
    Futures
    Streams

    Key Takeaways

    • Dart null safety prevents null pointer exceptions by verifying reference nullability at compile time.
    • Mixins allow sharing behaviors across multiple class hierarchies without inheriting from them.
    • Futures handle single async requests (like network calls), while Streams handle continuous sequences of data (like user inputs).

    Build Steps

    Knowledge Check

    How do you declare a variable that is nullable in Dart?

    Which constructor parameter syntax is used to bind fields directly?

    Which class yields multiple asynchronous values over time?

    Next Lesson

    03 — Setting Up Your Environment →