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An interface may define static methods, which must have an implementation.
An interface contains variables and methods like a class but the methods in an interface are abstract by default unlike a class. An interface extends another interface like a class implements an interface in interface inheritance.
An interface can extend other interfaces, just as a class subclass or extend another class. However, whereas a class can extend only one other class, an interface can extend any number of interfaces. The interface declaration includes a comma-separated list of all the interfaces that it extends.
Implements is used for Interfaces and extends is used to extend a class.
Extending interfaces We can use the extend keyword in TypeScript to inherit all the properties from an existing interface.