---
title: kCFCoreFoundationVersionNumber
framework: corefoundation
role: symbol
role_heading: Global Variable
path: corefoundation/kcfcorefoundationversionnumber
---

# kCFCoreFoundationVersionNumber

## Declaration

```swift
let kCFCoreFoundationVersionNumber: Double
```

## Discussion

Discussion The current version of the Core Foundation framework. Compare this value to the values in Framework Version Numbers.Although this variable was added to the CFBase.h header file in OS X v10.1, it was available and can be used in OS X v10.0.