# vSscal(_:_:_:) Scales a vector in place. ``` func vSscal(_ n: Int32, _ alpha: Float, _ x: UnsafeMutablePointer) ``` ## Parameters `n` number of elements in vector `x`; must be a multiple of 4. `alpha` scaling factor. `x` vector with `n` elements of type `float`. ## Discussion Each element of vector `x` is multiplied in place by `alpha`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)