Which data types are considered incomplete ABAP standard data types?

In ABAP programming, various data types are used to handle different types of data, and some data types are considered incomplete because they do not fully encapsulate a well-defined representation of data.

The data type classified as incomplete is the numeric type, specifically the "N" type, which is used to store numeric values represented as strings. It is known as a packed decimal type, but it does not indicate how many decimal places are held within the number, which renders it less straightforward than other data types such as integers or character strings. This lack of completeness comes from its inability to provide additional context, such as precision and scale, that would be necessary for a more versatile numeric representation.

On the other hand, the data types C (Character), P (Packed), and I (Integer) are complete in their definitions and usage. The Character type can store string data clearly, the Packed type provides a decimal representation with defined precision, and the Integer type allows clear and complete handling of whole numbers. This clarity and completeness help facilitate easier parsing and computations within ABAP programs.