---
title: "vvnextafter(_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vvnextafter(_:_:_:_:)"
---

# vvnextafter(_:_:_:_:)

Calculates the next machine-representable value for each element in an array of double-precision values.

## Declaration

```swift
func vvnextafter(_: UnsafeMutablePointer<Double>, _: UnsafePointer<Double>, _: UnsafePointer<Double>, _: UnsafePointer<Int32>)
```

## Discussion

Discussion Parameters: Not all values can be represented as a floating-point value of a given precision. This function sets a value in z[i] that is either minimally larger than the value in y[i] (if x[i] is larger than y[i]) or minimally smaller than the value in y[i] (if x[i] is smaller than y[i]).

## See Also

### Array-Oriented Arithmetic and Auxiliary Functions

- [ceil(_:)](accelerate/vforce/ceil(_:)-9dsdt.md)
- [ceil(_:)](accelerate/vforce/ceil(_:)-57grr.md)
- [ceil(_:result:)](accelerate/vforce/ceil(_:result:)-4wev4.md)
- [ceil(_:result:)](accelerate/vforce/ceil(_:result:)-6zm3u.md)
- [copysign(magnitudes:signs:)](accelerate/vforce/copysign(magnitudes:signs:)-s0r3.md)
- [copysign(magnitudes:signs:)](accelerate/vforce/copysign(magnitudes:signs:)-3jhf0.md)
- [copysign(magnitudes:signs:result:)](accelerate/vforce/copysign(magnitudes:signs:result:)-3zoya.md)
- [copysign(magnitudes:signs:result:)](accelerate/vforce/copysign(magnitudes:signs:result:)-5umya.md)
- [floor(_:)](accelerate/vforce/floor(_:)-64hyu.md)
- [floor(_:)](accelerate/vforce/floor(_:)-5awna.md)
- [floor(_:result:)](accelerate/vforce/floor(_:result:)-61veb.md)
- [floor(_:result:)](accelerate/vforce/floor(_:result:)-4mf4q.md)
- [nearestInteger(_:)](accelerate/vforce/nearestinteger(_:)-5mppu.md)
- [nearestInteger(_:)](accelerate/vforce/nearestinteger(_:)-386dx.md)
- [nearestInteger(_:result:)](accelerate/vforce/nearestinteger(_:result:)-bbtt.md)