Batch 'Challenge'

@echo off

REM :: The (Not so) "Impossible" Challenge.

REM :: OBJECTIVE - Test input of a number from keyboard and display a message of zero for number 0 and 1 for all other numbers

REM - Originally asked for Pascal / Delphi program language. https://chat.stackoverflow.com/rooms/882/programmers

REM :: RULES - Don't use any conditions (if..then, while, case, etc.), don't use any operators and don't use any functions with conditions.

REM - Batch Equivelant restrictions: Cannot use 'If', 'Else', 'x==y', 'x neq y', cannot use = + - / % * as operators.

:start
cls
CALL :loop
ECHO(%errorlevel%
pause
GOTO start

:loop
CHOICE /N /C:0123456789 /m "Enter a Number."
FOR /L %%a in (%errorlevel%,1,1) DO (
    exit /b 0
)

exit /b 1

Can you find another solution?