Dart: the mental model

Dart is a strongly typed language designed around productive application development. Flutter uses Dart because its type system, async model and tooling fit UI development well.

Core ideas

• Variables have static types, but local inference is common.
• Null safety makes nullable values explicit with ?. and ?. or ! when you have proved a value is non-null.
• Functions are first-class values and can be passed as callbacks.
• async and await provide readable asynchronous code.
• Classes, mixins, extensions and generics support reusable application architecture.

String name = 'LaySoftware';
int lessons = 100;
String? nickname;

final label = nickname ?? name;