---
title: "init(lowHalf:highHalf:)"
framework: swift
role: symbol
role_heading: Initializer
path: "swift/simd64/init(lowhalf:highhalf:)-7qmjs"
---

# init(lowHalf:highHalf:)

A vector formed by concatenating lowHalf and highHalf.

## Declaration

```swift
init(lowHalf: SIMD32<UInt32>, highHalf: SIMD32<UInt32>)
```

## Discussion

Discussion Equivalent to: var result = SIMD64<UInt32>() for i in 0..<32 {   result[i] = lowHalf[i]   result[32+i] = highHalf[i] }