Interfaces provide more sophisticated ways to organize and control the objects in your system. The interface keyword takes the abstract concept one step further. You could
think of it as a "pure" abstract class. It allows the creator to establish the form for a class: method names, argument lists, and return types, but no method bodies. An
interface can also contain fields, but The interface keyword takes the abstract concept one step further. You could think of it as a "pure" abstract class. It allows the creator
to establish the form for a class: method names, argument lists, and return types, but no method bodies. An interface can also contain fields, but An interface says: "This is
what all classes that implement this particular interface will look like." Thus, any code that uses a particular interface knows what methods might be called for that interface,
and that?s all. So the interface is used to establish a "protocol" between classes. (Some objectoriented programming languages have a keyword called protocolto do the
same thing.)

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