juniorFlutter
What is Dart and why does Flutter use it?
Updated Apr 28, 2026
Short answer
Dart is an object-oriented, strongly typed, garbage-collected language developed by Google, optimized for UI creation.
Deep explanation
Flutter uses Dart because it offers features tailored for UI development. It supports Just-In-Time (JIT) compilation for hot reload during development, and Ahead-Of-Time (AOT) compilation for fast, predictable native performance in production. It also allows building UI natively in code without a separate markup language like XML.
Real-world example
Writing business logic, API calls, and UI components all in the same language without bridging context between JS and Native.
Common mistakes
- Treating Dart exactly like JavaScript. Dart has strong static typing and sound null safety.
Follow-up questions
- What is sound null safety?
- What is JIT vs AOT in Dart?