---
title: ".<(_:_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/simd16/'._(_:_:)-6quf8"
---

# .<(_:_:)

A vector mask with the result of a pointwise less-than comparison.

## Declaration

```swift
static func .< (a: SIMD16<Scalar>, b: SIMD16<Scalar>) -> SIMDMask<SIMD16<Scalar>.MaskStorage>
```