# storeBytes(of:toUncheckedByteOffset:as:) Stores the given value’s bytes into the span’s raw memory at the specified byte offset. ``` mutating func storeBytes(of value: T, toUncheckedByteOffset offset: Int, as type: T.Type) where T : BitwiseCopyable ``` ## Parameters `value` The value to store as raw bytes. `offset` The offset from the start of the span, in bytes. `offset` must be nonnegative. `type` The type of `value`. ## Discussion This function does not validate `offset`; this is an unsafe operation. --- 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)