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The default string primitive in Go, [49] Julia, Rust, Swift (since version 5), [50] and PyPy [51] uses UTF-8 internally in all cases. Python (since version 3.3) uses UTF-8 internally for Python C API extensions [52] [53] and sometimes for strings [52] [54] and a future version of Python is planned to store strings as UTF-8 by default.
Thus, the number of code units required to represent a code point depends on the encoding: UTF-8: code points map to a sequence of one, two, three or four code units. UTF-16: code units are twice as long as 8-bit code units. Therefore, any code point with a scalar value less than U+10000 is encoded with a single code unit.
The Unicode Standard permits the BOM in UTF-8, [4] but does not require or recommend its use. [5] UTF-8 always has the same byte order, [6] so its only use in UTF-8 is to signal at the start that the text stream is encoded in UTF-8, or that it was converted to UTF-8 from a stream that contained an optional BOM. The standard also does not ...
The same character converted to UTF-8 becomes the byte sequence EF BB BF. The Unicode Standard allows the BOM "can serve as a signature for UTF-8 encoded text where the character set is unmarked". [74] Some software developers have adopted it for other encodings, including UTF-8, in an attempt to distinguish UTF-8 from local 8-bit code pages.
2. ^ Grey areas indicate non-assigned code points The Cyrillic Extended-D block (U+1E030 – U+1E08F) was added to the Unicode Standard in September, 2022 with the release of version 15.0: Cyrillic Extended-D [1] [2]
The default string primitive used in newer programing languages, such as Go, [22] Julia, Rust and Swift 5, [23] assume UTF-8 encoding. PyPy is also using UTF-8 for its strings, [24] and Python is looking into storing all strings with UTF-8. [25] Microsoft now recommends the use of UTF-8 for applications using the Windows API, while continuing ...
In the table below, the column "ISO 8859-1" shows how the file signature appears when interpreted as text in the common ISO 8859-1 encoding, with unprintable characters represented as the control code abbreviation or symbol, or codepage 1252 character where available, or a box otherwise. In some cases the space character is shown as ␠.
[example needed] In practice, the superset encoding Windows-1252 is the more likely effective default [7] and it is increasingly common for UTF-8 to work whether or not a standard specifies it. ISO-8859-1 is the IANA preferred name for this standard when supplemented with the C0 and C1 control codes from ISO/IEC 6429.