End-of-Text character

{{Short description|Control character}}

{{Use American English |date=February 2024}}

{{Use mdy dates |date=February 2024}}

{{distinguish|End-of-Transmission-Block character|End-of-Transmission character}}

{{for|other end-of-text characters|End mark (disambiguation)}}

{{More citations needed |date=February 2024}}

The End-of-Text character (ETX) is a control character used to inform the receiving computer that the end of a record has been reached. This may or may not be an indication that all of the data in a record have been received. It is often used in conjunction with Start of Text (STX) and Data Link Escape (DLE), e.g., to distinguish data frames in the data link layer. All this use is pretty much obsolete, except in modem communication (AT command set).[https://cdn.geekfactory.mx/sim7000g/SIM7000%20Series_AT%20Command%20Manual_V1.06.pdf Simcom SIM7000 Series - AT Command Manual]

In both ASCII and EBCDIC, ETX is code point 0x03, often displayed as {{mono|^C}}, and a (ASCII) terminal can send it by typing {{keypress|Ctrl|C}}.

Control-C is often used to interrupt a program or process, a standard that started with Dec operating systems.{{cn|date=November 2023}} In TOPS-20, it was used to gain the system's attention before logging in. mIRC uses ETX as the escape character to start a command to set the color.