Introduction to Numbers and Other Values

This topic describes object wrappers for primitive C data types, which are implemented by NSValue and its subclasses NSNumber and NSDecimalNumber, and the NSNull instance used to represent a null value.

Organization of This Document

This document contains the following articles:

• Using Values describes the generic value type.

• Using Numbers describes scalars.

• Using Decimal Numbers describes the objects used for base-10 arithmetic.

• Using NSNull describes using the NSNull instance.