# resetBytes(in:) Replaces the contents of the data buffer with zeros for the provided range. ``` mutating func resetBytes(in range: R) where R : RangeExpression, Self.Index == R.Bound ``` ## Parameters `range` The range of bytes to replace with zeros. ## Discussion The following example sets the bytes to zero for the bytes identified by the provided range: ```swift var dest: [UInt8] = [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF] dest.resetBytes(in: 1...3) // dest = [0xFF, 0x00, 0x00, 0x00, 0xFF, 0xFF] ``` --- 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)