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

# -(_:_:)

Subtracts one quaternion from another and produces their difference.

## Declaration

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