How do you find the product of all the items in a list box using visual basic?

Answer 1

Don't use a list box for this. The purpose of a list box is to present a list of items from which a user can make a selection. That's clearly not what you are trying to do. Use an array instead (you can always construct a list box from an array if required):

Dim values As Integer() = {5, 3, 6, 4, 2}

Dim product As Integer = values(0)

For index = 1 To values.GetUpperBound(0)

product = product * values(index)

Next

Debug.WriteLine(product)

' output

' 720

Note that the for loop starts at index 1 rather than index 0. This is because the value at index 0 is already stored in the product variable and you want to multiply that value by the indexed value to create a new product. Thus on each iteration of the loop, the product accumulates.