exit (command)

In computing, exit is a command used in many operating system command-line shells and scripting languages.

The command causes the shell or program to terminate. If performed within an interactive command shell, the user is logged out of their current session, and/or user's current console or terminal connection is disconnected. Typically an optional exit code can be specified, which is typically a simple integer value that is then returned to the parent process.

Operating systems, shells, and scripting languages providing this command include Microsoft MSX-DOS version 2, IBM OS/2, DR FlexOS, HP MPE/iX, KolibriOS, SymbOS, cmd.exe, sh, ksh, Perl, AWK, PHP, TCL, PowerShell, and others.

On MS-DOS, the command is available in versions 2 and later. DR DOS 6.0 and Datalight ROM-DOS also include an implementation of the exit command. It is also available in the open source MS-DOS emulator DOSBox.

The numerical computing environment MATLAB includes an exit function with similar functionality.

• exit (system call)
• Exit status
• List of Unix commands
• List of DOS commands

• Cooper, Jim (2001). Special Edition Using MS-DOS 6.22, Third Edition. Que Publishing. ISBN 978-0789725738.
• Dyson, Peter (1995). Mastering OS/2 Warp. Sybex. ISBN 978-0782116632.
• Barrett, Daniel J. (2012). Macintosh Terminal Pocket Guide: Take Command of Your Mac. O'Reilly. ISBN 978-1449328986.
• Stanek, William R. (2008). Windows Command-Line Administrator's Pocket Consultant, 2nd Edition. Microsoft Press. ISBN 978-0735622623.

• exit: cause the shell to exit – Commands & Utilities Reference, The Single UNIX® Specification, Issue 7 from The Open Group
• exit | Microsoft Docs