---
title: "+(_:_:)"
framework: simd
role: symbol
role_heading: Operator
path: "simd/simd_quatd/+(_:_:)"
---

# +(_:_:)

Adds two quaternions and produces their sum.

## Declaration

```swift
static func + (lhs: simd_quatd, rhs: simd_quatd) -> simd_quatd
```