---
title: ".!(_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/simdmask/'.!(_:)-9oij3"
---

# .!(_:)

A vector mask that is the pointwise logical negation of the input.

## Declaration

```swift
static func .! (a: SIMDMask<Storage>) -> SIMDMask<Storage>
```

## Discussion

Discussion Equivalent to: var result = SIMDMask<SIMD4<Int8>>() for i in result.indices {   result[i] = !a[i] }