# fill(_:with:) Populates a single-precision vector with a specified scalar value. ``` static func fill(_ vector: inout V, with value: Float) where V : AccelerateMutableBuffer, V.Element == Float ``` ## Parameters `vector` The vector to populate with the specified value. `value` The value to populate. ## Discussion This function populates a vector with a specified scalar value. The following code shows how to set each element of vector `c` to pi: ```swift let a = Float.pi var c = [Float](repeating: .nan, count: 10) vDSP.fill(&c, with: a) // Prints "[3.1415925, 3.1415925, 3.1415925, // 3.1415925, 3.1415925, 3.1415925, // 3.1415925, 3.1415925, 3.1415925, // 3.1415925]" print(c) ``` --- 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)