---
title: "simd_make_half16_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_half16_undef(_:)-5x8m"
---

# simd_make_half16_undef(_:)

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

## Declaration

```swift
func simd_make_half16_undef(_ other: Float16) -> simd_half16
```

## See Also

### Functions to create 16-element vectors from scalar values

- [simd_make_half16(_:)](simd/simd_make_half16(_:)-923w5.md)