---
title: "simd_make_long2_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_long2_undef(_:)"
---

# simd_make_long2_undef(_:)

Returns a new vector with the first element set to a scalar value, and other elements undefined.

## Declaration

```swift
func simd_make_long2_undef(_ other: simd_long1) -> simd_long2
```

## See Also

### Functions to Create Two-Element Vectors From Scalar Values

- [simd_make_long2(_:)](simd/simd_make_long2(_:)-698vu.md)
- [simd_make_long2(_:_:)](simd/simd_make_long2(_:_:).md)