---
title: yaw
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vnfaceobservation/yaw
---

# yaw

The yaw angle of a face in radians.

## Declaration

```swift
var yaw: NSNumber? { get }
```

## Discussion

Discussion This value indicates the rotational angle of the face around the y-axis. If the request doesn’t calculate the angle, the value is nil.

## See Also

### Determining Facial Orientation

- [roll](vision/vnfaceobservation/roll.md)
- [pitch](vision/vnfaceobservation/pitch.md)