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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.
| 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
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void data type
- A data type that has no values or operators and is used to represent nothing.
Read also:
OpenStax, Programming fundamentals - a modular structured approach using c++. OpenStax CNX. Jan 10, 2013 Download for free at http://cnx.org/content/col10621/1.22
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