921. Factorial of a Given Number

Given an integer n, return the factorial of n.

Factorial of a non-negative integer, is the multiplication of all integers smaller than or equal to n (use 64-bits to return answer).

Example 1:

Input : n = 3

Output : 6

Explanation : Factorial = 1 * 2 * 3 => 6

Example 2:

Input : n = 5

Output : 120

Explanation : Factorial = 1 * 2 * 3 * 4 * 5 => 120

Now Your Turn!

Pick the correct output for the given input

Input : n = 4

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Let’s go through a few more examples, step by step, to make it clearer.

Constraints:

  • 0 <= n <= 15
0
class Solution{
public:
long long int factorial(int n){
//your code goes here
}
};
Test Case

Input:

Nums
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