30. Factorial
Foundation1000 ms256 MBSolved by 0%
Read an integer n and print n!, the product of all integers
from 1 to n.
By definition 0! = 1.
Constraints - `0 ≤ n ≤ 20`
Input
A single line containing one integer n.
Output
Print one integer, the factorial of n.
Input5
Output120
Noteis a small factorial
Input0
Output1
Noteis zero factorial, which is defined as 1 and which an empty loop must produce
Hints
Four rungs, in order. The last two open once you have submitted an attempt. A wrong one counts.
Hint 1Where to start
Hint 2The approachOpen hint 1 first. This one carries on from it.
Hint 3PseudocodeOpen hint 2 first. This one carries on from it.
Hint 4Full solutionOpen hint 3 first. This one carries on from it.