Batch File input validation - Make sure user entered an integer

Question

I\'m experimenting with a Windows batch file to perform a simple operation which requires the user to enter a non-negative integer. I\'m using simple batch-file techniques t

Answer 1

you can reinvent the wheel and grow a few white hairs doing string validation in batch, or you can use vbscript

strInput = WScript.Arguments.Item(0)
If IsNumeric(strInput) Then
    WScript.Echo "1"
Else
    WScript.Echo "0"
End If

save it as checkdigit.vbs and in your batch

@echo off
for /F %%A in ('cscript //nologo checkdigit.vbs 100') do (
        echo %%A
        rem use if to check whether its 1 or 0 and carry on from here
)