What classification identifies one of the various types of data, such as real, integer, or Boolean, that determines the possible values for that type?

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A data type is the classification that describes what kind of values a variable can hold and what operations are valid on those values. It determines the set of possible values, such as integers for whole numbers, real numbers for fractional values, and Booleans for true/false. It also informs how much memory to allocate and how expressions involving that value behave. While data structures describe how data items are organized and classes define blueprints for objects, and an enumeration defines a specific type with a fixed list of named values, the broad concept that covers real, integer, and Boolean as ways to represent data is data type.