Why does my Loop end after 11 Loops?

[Kernelpanic]

 With the help you guys have provided here, my program no longer stops after 11 loops. I'm messing with stacking Recursion - computer is humming. Thanks again

The IF . . . ELSE condition is mandatory, otherwise the program goes into an endless loop!

Example: 4! (n)
If n = 1 -> No --> Else  next
If n = 1 -> No --> Else
and so on ...
At last:
If n = 1 Yes -> Finish

Now the values will be pop from the stack and output.