Trailing zeroes in factorial

Easy

For an integer N find the number of trailing zeroes in N!.

Example 1:

Input:
N = 5
Output:
1
Explanation:
5! = 120 so the number of trailing zero is 1.

Example 2:

Input:
N = 4
Output:
0
Explanation:
4! = 24 so the number of trailing zero is 0.

Your Task:  
You don't need to read input or print anything. Your task is to complete the function trailingZeroes() which take an integer N as an input parameter and returns the count of trailing zeroes in the N!.

Expected Time Complexity: O(logN)
Expected Auxiliary Space: O(1)

Constraints:
1 <= N <= 10⁹