C0 and C1 control codes
Control characters, ranging from U+0000 to U+001F (C0) and U+0080 to U+009F (C1) in Unicode / From Wikipedia, the free encyclopedia
"DC1" redirects here. For other uses, see DC1 (disambiguation).
"Group separator" redirects here. For the delimiter used to group digits in large numbers, see Decimal separator § Digit grouping.
The C0 and C1 control code or control character sets define control codes for use in text by computer systems that use ASCII and derivatives of ASCII. The codes represent additional information about the text, such as the position of a cursor, an instruction to start a new line, or a message that the text has been received.
C0 codes are the range 00HEX–1FHEX and the default C0 set was originally defined in ISO 646 (ASCII). C1 codes are the range 80HEX–9FHEX and the default C1 set was originally defined in ECMA-48 (harmonized later with ISO 6429). The ISO/IEC 2022 system of specifying control and graphic characters allows other C0 and C1 sets to be available for specialized applications, but they are rarely used.