# .<(_:_:) Pointwise compare less than. ``` static func .< (a: SIMD64, b: Scalar) -> SIMDMask.MaskStorage> ``` ## Discussion Each lane of the result is true if that lane of a is less than b, and false otherwise. Equivalent to: ``` var result = SIMDMask() for i in 0..<64 { result[i] = (a[i] < b) } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)