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Class Declaration & Structure
Classes are a blueprint for creating individual objects that contain the general characteristics of a defined object type.
Local Variable Declaration
Used to declare a variable outside of a class.
Class and Instance Variables
Used declare variables within a class. There are two main types: class variables, which have the same value across all class instances (i.e. static variables), and instance variables, which have different values for each object instance.
A module contains methods and fields for use when declaring a class.
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