# init(utf8String:) Returns an @c NSString object initialized by copying the characters from a given C array of UTF8-encoded bytes. ``` convenience init?(utf8String nullTerminatedCString: UnsafePointer) ``` ## Parameters `nullTerminatedCString` A @c NULL-terminated C array of bytes in UTF-8 encoding. This value must not be @c NULL. ## Return Value An @c NSString object initialized by copying the bytes from @c nullTerminatedCString. The returned object may be different from the original receiver. --- 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)