An Internal Representation comprising one or more bits, and An interpretation of that representation. A set of Operations that may be performed on it. The nature of these attributes is defined by the type of the data item. The type of a data item also dictates the operations that can be performed on it. White space is not allowed.
Case is significant.
The amount of memory required by a particular data item is dictated by its type . The binary number stored at an address associated with a data item is its value . The required interpretation is again dictated by the data item's type. The possible values that are associated with a data type, such as the values a , b , c , etc. It is important to distinguish between these.