Given an integer N. You have to find the number of digits that appear in its factorial, where factorial is defined as, factorial(N) = 1*2*3*4……..*N and factorial(0) = 1.
Input:N = 5
5! is 120 so there are 3
digits in 120
N = 100
100! is 3628800â€‹ so there are
7 digits in 3628800â€‹
Your Task: You don't need to read input or print anything. Your task is to complete the function facDigits() which takes an integer N as input parameter and returns the number of digits in factorial of N.
Expected Time Complexity: O(1) Expected Space Complexity: O(1)