Icarus challenge

@echo off
setlocal enabledelayedexpansion

Title GL1TCH3D Challenge Submission for Icarus Lives' Challenge
:top
set /p number=What positive number would you like to start with?
set num=%number: =%
if not %num% GTR 0 cls&goto top

::If your number is even, divide it by 2.
::If your number is odd, multiply it by 3, and add 1.
::Challenge ends when the script hits 1.

::The process to be used for determining even or odd is that batch always rounds down.
::A number divided by two will be compared to the original number added with 3, divided by 2 then subtracted by 1.
::An odd number will go up by 1 while an even number will only go up by 0 after subtracting 1.
set step0=%num%
set prev=%num%
for /l %%a in (1,1,100000) do (
set step%%a=!prev!
set /a tempnum1=!prev! / 2
set /a tempnum2=!prev! + 3
set /a tempnum2=!tempnum2! / 2
set /a tempnum2=!tempnum2! - 1
if !tempnum1!==!tempnum2! set /a step%%a=!step%%a! / 2
if not !tempnum1!==!tempnum2! set /a step%%a=!step%%a! * 3 + 1
if !step%%a!==1 set total=%%a & goto end
set prev=!step%%a!
)

:end
echo Your chosen number = %number%
echo The number of steps = %total%
set list=%num%
for /l %%b in (1,1,%total%) do (
set list=!list!, !step%%b!
)
echo All steps = %list%

pause > nul