The reason is that you screwed up the condition in your loop. N2==5 is true only later in the loop, not at the beginning, so the loop never begins because N2 is initiailzed to 1.

If this was changed to !=5 it would work, but it'd be very very wrong. In code like this you should avoid != because < is clearly better. If N2 is never meant to be 5 or more, then 6 is obviously out too. Using < guarantees that if N2 ever somehow got contaminated with a fractional value, it'd still work.

Lummox JR