EXIT

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Exits the DOS console or, with /b, only the currently running batch or the currently executed subroutine. If used without /b in a batch file, causes the DOS console calling the batch to close.

Examples:

exit
exit /b

Links:

$ exit /?
Quits the CMD.EXE program (command interpreter) or the current batch
script.

EXIT [/B] [exitCode]

  /B          specifies to exit the current batch script instead of
              CMD.EXE.  If executed from outside a batch script, it
              will quit CMD.EXE

  exitCode    specifies a numeric number.  if /B is specified, sets
              ERRORLEVEL that number.  If quitting CMD.EXE, sets the process
              exit code with that number.