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:

• ‚ÄúUsing Values‚Äù describes the generic value type.

• ‚ÄúUsing Numbers‚Äù describes scalars.

• ‚ÄúUsing Decimal Numbers‚Äù describes the objects used for base-10 arithmetic.

• ‚ÄúUsing NSNull‚Äù describes using the NSNull instance.

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