---
title: "simd_make_char64_undef(_:)"
framework: simd
role: symbol
role_heading: Function
path: "simd/simd_make_char64_undef(_:)-2ljie"
---

# simd_make_char64_undef(_:)

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

## Declaration

```swift
func simd_make_char64_undef(_ other: CChar) -> simd_char64
```

## See Also

### Functions to Create Sixty Four-Element Vectors From Scalar Values

- [simd_make_char64(_:)](simd/simd_make_char64(_:)-bvt7.md)