---
title: Predefined Values
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/predefined-values
---

# Predefined Values

CFNumber provides some predefined number values.

## Topics

### Constants

- [kCFNumberNaN](corefoundation/kcfnumbernan.md)
- [kCFNumberNegativeInfinity](corefoundation/kcfnumbernegativeinfinity.md)
- [kCFNumberPositiveInfinity](corefoundation/kcfnumberpositiveinfinity.md)

## See Also

### Constants

- [CFNumberType](corefoundation/cfnumbertype.md)