EXIT
Quit the current batch script, quit the current subroutine or quit the command processor (CMD.EXE) optionally setting an errorlevel code.
Syntax
EXIT [/B] [exitCode]
Key
/B When used in a batch script, this option will exit
only the script (or subroutine) but not CMD.EXE
exitCode Sets the %ERRORLEVEL% to a numeric number.
If quitting CMD.EXE, set the process exit code no.
You should never attempt to directly write to the %errorlevel% variable, (i.e. don’t try anything like SET errorlevel...) using the EXIT command provides a safe way to alter the value of the built-in errorlevel variable. Unlike goto:eof the Exit /b command allows you to set a specific errorlevel.
Examples
:: Exit if a required file is missing
@echo off
If not exist MyimportantFile.txt Exit /b
Echo If we get this far the file was found
:: Set the error level to 5
@echo off
call :setError
echo %errorlevel%
goto :eof
:setError
exit /B 5
To make this more flexible you can change the subroutine to set any errorlevel like this:
:setError
exit /B %1
Now you can call the subroutine: call :setError 6 replacing 6 with whatever value you need the errorlevel to be set to.