In Dart, every class can act as an interface. An interface defines a contract that other classes must follow by implementing its methods and properties. Unlike some other programming languages, Dart does not have a separate interface keyword. Instead, interfaces are created using classes and implemented using the implements keyword.
Contract Enforcement: Interfaces ensure that implementing classes define all methods and properties specified in the interface class.
No Default Implementations: When a class is used as an interface, its methods do not carry default implementations. The implementing class must override all methods.
Multiple Implementations: A class can implement multiple interfaces, allowing for a mixin-style approach to code reuse.
No Inheritance: Unlike extends, implements does not inherit functionality. It only enforces method definitions.
