---
title: "&+=(_:_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/simd3/&+=(_:_:)-5ycfs"
---

# &+=(_:_:)

Updates the left hand side with the wrapping sum of the two vectors.

## Declaration

```swift
static func &+= (a: inout SIMD3<Scalar>, b: SIMD3<Scalar>)
```