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Class
A blueprint for creating objects, defining their data (attributes) and actions (methods).
Identifier
A name used to identify a programming entity, such as a class, variable, or method.
Instance variable
A variable defined in a class for which each instantiated object of the class has its own copy.
Local variable
A variable declared within a method or block of code.
Parameter variable
A variable used to pass data into a method.
Primitive
A basic data type provided by a programming language.
Return value
The data that a method sends back to the code that called it.