---
title: unitExponent
framework: corehid
role: symbol
role_heading: Instance Property
path: corehid/hidelement/unitexponent
---

# unitExponent

The calculated exponent for this element.

## Declaration

```swift
var unitExponent: Int8?
```

## Discussion

Discussion Some items in the report descriptor have exponent codes associated with them. The code specifies the exponent that should be applied to the scaled and shifted logical value to calculate the physical value. The value here represents the actual exponent value, calculated from the code specified in the report descriptor.