# init(CString:length:) Initializes the receiver, a newly allocated `NSString` object, by converting the data in a given C-string from the default C-string encoding into the Unicode character encoding. ``` convenience init?(CString bytes: UnsafePointer, length: Int) ``` ## Discussion This method converts `length` * `sizeof(char)` bytes from `cString` and doesn’t stop short at a zero character. `cString` must contain bytes in the default C-string encoding and may not be `NULL`. Returns an initialized object, which might be different from the original receiver. ## See Also --- 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)