Factorial
Factorial
EasyLoops45% accepted
The factorial of N (written N!) is the product of all positive integers up to N. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. Factorial appears everywhere in combinatorics and probability. Given N, compute N!.
Approach
Given a non-negative integer N (0 ≤ N ≤ 12), print N! (N factorial).
Input
0
Output
1
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