100 cls
110 limite = 13
120 for i = 0 to limite
130   print right$(str$(i),2);"! = ";tab (6);factoriali(i)
140 next i
150 sub factoriali(n) : 'Iterative
160   f = 1
170   if n > 1 then
180     for j = 2 to n
190       f = f*j
200     next j
210   endif
220 factoriali = f
230 end sub