---
title: "*=(_:_:)"
framework: simd
role: symbol
role_heading: Operator
path: "simd/simd_quatd/*=(_:_:)-66wf4"
---

# *=(_:_:)

Multiplies a quaternion and a scalar value, and stores the result in the left-hand-side variable.

## Declaration

```swift
static func *= (lhs: inout simd_quatd, rhs: Double)
```