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

# vSaxpy(_:_:_:_:)

Multiplies a vector by a scalar , adds it to a second vector , and stores the result in the second vector.

## Declaration

```swift
func vSaxpy(_ n: Int32, _ alpha: Float, _ x: UnsafePointer<vFloat>, _ y: UnsafeMutablePointer<vFloat>)
```

## Parameters

- `n`: Number of elements in each of the vectors x and y; must be a multiple of 4.
- `alpha`: A multiplier for the vector x.
- `x`: A vector array of float values.
- `y`: A second vector array of float values.

## Discussion

Discussion The elements of x are multiplied by alpha and added to the corresponding elements of y.  The results are stored in y.

## See Also

### Vector-Scalar Linear Algebra Functions (from vectorOps.h)

- [vIsamax(_:_:)](accelerate/visamax(_:_:).md)
- [vIsamin(_:_:)](accelerate/visamin(_:_:).md)
- [vIsmax(_:_:)](accelerate/vismax(_:_:).md)
- [vIsmin(_:_:)](accelerate/vismin(_:_:).md)
- [vSasum(_:_:)](accelerate/vsasum(_:_:).md)
- [vSsum(_:_:)](accelerate/vssum(_:_:).md)
- [vSnaxpy(_:_:_:_:_:)](accelerate/vsnaxpy(_:_:_:_:_:).md)
- [vScopy(_:_:_:)](accelerate/vscopy(_:_:_:).md)
- [vSdot(_:_:_:)](accelerate/vsdot(_:_:_:).md)
- [vSndot(_:_:_:_:_:_:)](accelerate/vsndot(_:_:_:_:_:_:).md)
- [vSnrm2(_:_:)](accelerate/vsnrm2(_:_:).md)
- [vSnorm2(_:_:)](accelerate/vsnorm2(_:_:).md)
- [vSrot(_:_:_:_:_:)](accelerate/vsrot(_:_:_:_:_:).md)
- [vSscal(_:_:_:)](accelerate/vsscal(_:_:_:).md)
- [vSswap(_:_:_:)](accelerate/vsswap(_:_:_:).md)