---
title: "simd_dot(_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_dot(_:_:)-2dt0z"
---

# simd_dot(_:_:)

## Declaration

```swift
func simd_dot(_ p: simd_quath, _ q: simd_quath) -> Float16
```

## Discussion

Discussion The dot product of the quaternions p and q interpreted as four-dimensional vectors.