Question

OK so i just started to learn vb and did some experimenting until i came across this thing which i cant understand

So i have a console application with two modules

Module1.vb (program starts form this)

Module Module1

    Sub Main()
        add.addone()
        add.addone()
        add.addone()
        Console.Read()
    End Sub

End Module

add.vb

Public Module add
    Private counter As Integer

    Public Sub addone()
        counter += 1
        Console.Write(counter)
    End Sub
End Module

I expect it to print on the console a pattern of:

1
1
1

Why does it print out

1
2
3

Im asking this because, what i understand is, after add.addone() is called. The variable (counter) should no longer exist! So when add.addone() is called for the second time it should be blank and thus, printing out 1 again.

I hope you can help me. What am i doing wrong and why is this happening?

thanks,
Vidhu

Answer 1

after add.addone() is called. The variable (counter) should no longer exist!

Why would that be? counter is declared outside of addone, in the surrounding module add. So of course it remains in existence even after the method exits.

(Incidentally, you should follow the .NET PascalCase naming convention for modules and methods …)