# storeBytes(of:toByteOffset:as:_:) Stores the given value’s bytes to the specified offset into the span’s memory. ``` mutating func storeBytes(of value: T, toByteOffset offset: Int, as type: T.Type, _ byteOrder: ByteOrder) where T : BitwiseCopyable, T : ConvertibleToBytes, T : FixedWidthInteger ``` ## Parameters `value` The value to store as raw bytes. `offset` The offset in bytes into the span’s memory at which to begin writing the bytes from the value. `type` The type of the instance to store. `byteOrder` The order in which the bytes will be encoded to the span. ## Discussion The range of bytes required to store a value of type `T` starting at byte offset `offset` must be completely within the span. `offset` is not required to be aligned for `T`. --- 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)