Python: Find the number of zeros at the end of a factorial of a given positive number

Python Basic - 1: Exercise-20 with Solution

Write a Python program to find the number of zeros at the end of a factorial of a given positive number.

Range of the number(n): (1 ≤ n ≤ 2*109).

Sample Solution:

Python Code:

def factendzero(n):
  x = n // 5
  y = x 
  while x > 0:
    x /= 5
    y += int(x)
  return y
       
print(factendzero(5))
print(factendzero(12))
print(factendzero(100))

Sample Output:

1
2
24

Pictorial Presentation:

Flowchart:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to find the value of n where n degrees of number 2 are written sequentially in a line without spaces.
Next: Write a Python program to find the number of notes (Sample of notes: 10, 20, 50, 100, 200 and 500 ) against an given amount.