I am developing a script in which I need the user to select from a list that provides them with the tool they want to use and that depending on this input takes them to the other part of the code. However, since I don’t know much about batch language, I asked ChatGPT and with similar projects that I saw on this site, I tried to do it. The problem in general is when the user types the number and presses enter, the program closes immediately. This is my code:

echo 1. Temporary Cleaning.
echo 2. Installation of Applications.
echo 3. Application Update.
echo 4. Exit
echo.
echo.

:digitnumber
set /p ntool= Enter the number of the tool you need:
set "vnumber=false"
set "nvalid= 1 2 3 4 "
for %%A in (%invalid%) do ( if "%ntool%"=="%%A" (
            set "vnumber=true"
            goto validnumber
        )
)

:validnumber
if "%vnumber%"=="true" (
   
    if "%ntool%"=="1" (
        echo You have selected option 1.

    ) else if "%ntool%"=="2" (
        echo You have selected option 2.
        
    ) else if "%ntool%"=="3" (
        echo You have selected option 3.
        
    ) else if "%ntool%"=="4" (
        echo You have selected option 4.
        
    )
) else (
    echo Invalid selection. Please select a valid option (1-4).
    goto enter number
)

pause

`
If you can help me I would really appreciate it.

I ran the code part by part and apparently the problem lies after checking whether the variable is a valid number or not. But I do not know what to do