---
title: ".<(_:_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/simd64/'._(_:_:)-7srs5"
---

# .<(_:_:)

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

## Declaration

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