Summary  
This chapter explains null safety, a type system feature that enforces non-nullable and nullable type distinctions at compile time to prevent null dereference errors, and demonstrates techniques like safe calls, null checks, and optional value handling.  

General domain of usage  
Mobile application development

Master the essentials of variables and data types in Dart. This course guides absolute beginners through Dart's variable declarations, type inference, core data types, and null safety, using engaging explanations and real-world themed challenges.

Explore how to declare variables in Dart, the difference between var, final, and const, and how type inference works compared to explicit typing.

Dive into Dart's essential data types: int, double, bool, String, and num. Learn how and when to use each type.

Understand Dart's approach to null safety, including nullable and non-nullable types, default values, and null checks.

Null Safety in Real-World Apps

Null Safety in Real-World Apps