saneetkaul07 / factorial-of-number

Given a positive integer N. The task is to find factorial of N.

factorial-of-number

Given a positive integer N. The task is to find factorial of N.

Example 1:

Input: N = 4 Output: 24 Explanation: 4! = 4 * 3 * 2 * 1 = 24 Example 2:

Input: N = 13 Output: 6227020800 Explanation: 13! = 13 * 12 * .. * 1 = 6227020800 Your Task: You don't need to read input or print anything. Your task is to complete the function factorial() that takes N as parameter and returns factorial of N.

Expected Time Complexity : O(N) Expected Auxilliary Space : O(1)

Constraints: 0 <= N <= 18