Question

Having a problem with this code.
my coding is the following:

    fitvalchild1 = 0
    fitvalchild2 = 0

    For i = 1 To 30                            
        counter = 30

        Do While counter > 0
            fitvalchild1 = fitvalchild1 + child1(counter) * 2 ^ (i - 1)
            fitvalchild2 = fitvalchild2 + child2(counter) * 2 ^ (i - 1)
            counter = counter - 1
        Loop
    Next i

all the variables are declared as long…

Still i get the Error : overflow and the line highlighted is:

fitvalchild1 = fitvalchild1 + child1(counter) * 2 ^ (i - 1)

Answer 1

The Long datatype has a maximum size of 2,147,483,647.
2 ^ (30-1) = 536,870,912
so, depending on the value of child1(counter) and fitvalchild1, you’ll easily exceed the maximum.

You’re adding the value to itself with each loop, so after 4-5 loops, you’ll likely get the error.

If you don’t mind switching away from an integer type, you might try using Currency datatype. It has a maximum size of 922,337,203,685,477.5807