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Void Data Type

Module by: Kenneth Leroy Busbee. E-mail the author

Summary: An explanation of the void data type.

General Discussion

The void data type has no values and no operations. It's a data type that represents the lack of a data type.

Table 1
C++ Reserved Word void
Represent Nothing
Size N/A or None
Normal Signage N/A
Domain (Values Allowed) None

This data type was added in the transition from "C" to "C++". In "C" by default a function returned an integer data type. Some functions don't return a value of any kind. Thus, the need to have a data type that indicates nothing is being returned. The void data type is mainly used in the definition and prototyping of functions to indicate that either nothing is being passed in and/or nothing is being passed out.

Definitions

Definition 1: void data type
A data type that has no values or operators and is used to represent nothing.

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