i just create a console project and put your code and it works...

Ok Dnx,
So did that, but how do i check if its "." or "," i could only deplay the value in the program at run time.

3dees

it worked???
Did you convert it to double as well?

yes, i didn't change anything in your code

maybe check what you enter... and regional settings?

ok Dnx
Tried it again and it worked, will have to check to understand why it didn't worked before.

Dim Liters As String = Console.ReadLine()
quantity = Convert.ToDouble(Liters)

Thanks very much Dnx.

No problem, glad i could help even if your code was good since the beginning

Regards.

Hey sometimes it just takes a 2nd pair of eyezzzzzz + just this week load VB2008 so now sure if i have all the ms updates.

hay,
the below method is the method to use type casting and it will execute
u check it (if u want to cast as value use below or else use type cast(source,typename))
Dim a, quantity As Double
Console.Write("How many liters(only whole liters please )? ")
a = Console.ReadLine()
quantity = CType(a, Double)
Console.WriteLine(quantity)
reply pls.,,

I know of the "Convert "class in vb and i think you can try this