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Introduction to Numbers and Other Values

Contents:

Organization of This Document

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.

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