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Factorial Zeros

What Are Factorial Zeros ?

The factorial of a non-negative integer n, denoted by n! is the product of all positive integers less than or equal to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.

Factorial Zeros is basically a program in which we calculate the number of trailing zeros in n! where n is any positive number less than 10⁷.

Example

Input : num = 5
Output : 1
Factorial Of 5 is 120 which has 1 trailing zero.

Input : num = 15
Output : 3
Factorial of 15 is 1307674368000 which has 3 trailing zeroes.

Input : num = 20
Output : 4
Factorial of 20 is 2432902008176640000 which has 4 trailing zeroes.

Check For Factorial Zeros

Trailing Zeros

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n! & trailing zero