17 lines
135 B
Ruby
17 lines
135 B
Ruby
def fact(n)
|
|
if n == 0
|
|
then
|
|
1
|
|
else
|
|
res = 1
|
|
i = n
|
|
until i == 0
|
|
res = res * i
|
|
i = i - 1
|
|
end
|
|
res
|
|
end
|
|
end
|
|
|
|
puts fact(5)
|