---
title: kCFNumberNegativeInfinity
framework: corefoundation
role: symbol
role_heading: Global Variable
path: corefoundation/kcfnumbernegativeinfinity
---

# kCFNumberNegativeInfinity

Designates a negative infinity value.

## Declaration

```swift
let kCFNumberNegativeInfinity: CFNumber!
```

## See Also

### Constants

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