Polymorphism

Polymorphism means that an expression can produce values of more than one type.

Related concepts:  TypeSubtyping

Closest Wikipedia entry:  Polymorphism (computer science) — In programming language theory and type theory, polymorphism is the use of a single symbol to represent multiple different types.In Object-oriented programming, polymorphism is the provision of a single interface to entities of different types The concept is borrowed from a principle in biology where an organism or species can have many different forms or stages.The most commonly recognized major forms of polymorphism are: Ad hoc polymorphism: defines a common interface for an arbitrary set of individually specified types. Parametric polymorphism: not specifying concrete types and instead use abstract symbols that can substitute for any type. Subtyping (also called subtype polymorphism or inclusion polymorphism): when a name denotes instances of many different classes related by some common superclass.

Misconceptions about Polymorphism
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