---
title: ".<(_:_:)"
framework: swift
role: symbol
role_heading: Operator
path: "swift/simd64/'._(_:_:)-89gyk"
---

# .<(_:_:)

Pointwise compare less than.

## Declaration

```swift
static func .< (a: SIMD64<Scalar>, b: SIMD64<Scalar>) -> SIMDMask<SIMD64<Scalar>.MaskStorage>
```

## Discussion

Discussion Each lane of the result is true if that lane of a is less than the corresponding lane of b, and false otherwise. Equivalent to: var result = SIMDMask<MaskStorage>() for i in 0..<64 {   result[i] = (a[i] < b[i]) }