---
title: kUCKeyOutputGetIndexMask
framework: coreservices
role: symbol
role_heading: Global Variable
path: coreservices/kuckeyoutputgetindexmask
---

# kUCKeyOutputGetIndexMask

You can use this mask to test the bits (0–13) in a UCKeyOutput value that provide the actual index to another structure.

## Declaration

```swift
var kUCKeyOutputGetIndexMask: Int { get }
```