Dart 3 is the latest version of the Dart programming language, and it introduces a number of new features that make it more reliable and productive. These features include sound null safety, records, patterns, abstract data types, and class modifiers.
Sound null safety is one of the most important new features in Dart 3. It eliminates the possibility of null pointer exceptions, which can be a major source of errors in Dart code. Records are a new type that lets you aggregate multiple values of different types in a single function return. This makes it easier to work with structured data. Patterns are a new category of grammar that lets you match and destructure values. This makes it easier to work with complex data structures. Abstract data types are a new way to define data structures that cannot be created or modified directly. This makes it easier to create robust and reusable code. Class modifiers are a new set of keywords that let you control how a class or mixin can be used. This makes it easier to create flexible and extensible code.
These new features make Dart 3 a more reliable and productive language. If you are a Dart developer, I encourage you to learn more about these new features and how they can help you write better code.