Nested For Loops
v Just as with Do While loops, we can nest one for loop
inside another.  This is very common when dealing
with 2-dimensional arrays
v For each iteration of the outer loop executes, we start
the inner loop over again.
Result:
1  1
1  2
2  1
2  2
3  1
3  2
Dim i As Integer, j As Integer
For i = 1 To 3
    For j = 1 To 2
        Print i, j
    Next j
Next i