---
title: "dot(_:_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/dot(_:_:)-4gb9g"
---

# dot(_:_:)

Returns the dot product of two vectors.

## Declaration

```swift
func dot(_ x: SIMD3<Float>, _ y: SIMD3<Float>) -> Float
```

## See Also

### Geometry Functions

- [cross(_:_:)](simd/cross(_:_:)-8xu8k.md)
- [normalize(_:)](simd/normalize(_:)-ac7.md)
- [project(_:_:)](simd/project(_:_:)-9ggyv.md)
- [reflect(_:n:)](simd/reflect(_:n:)-64cgz.md)
- [refract(_:n:eta:)](simd/refract(_:n:eta:)-7jv66.md)