w3resource

C Exercises: Find the number of trailing zeroes in a given factorial

C Programming Mathematics: Exercise-10 with Solution

Write a C program to find the number of trailing zeroes in a given factorial.

Example 1:
Input: 4
Output: 0
Explanation: 4! = 24, no trailing zero.
Example 2:
Input: 6
Output: 1
Explanation: 6! = 720, one trailing zero.

Example:
Input:
n = 4
n = 5
Output:
Number of trailing zeroes of factorial 4 is 0
Number of trailing zeroes of factorial 5 is 1

Pictorial Presentation:

C Exercises: Find the number of trailing zeroes in a given factorial

Sample Solution:

C Code:

#include <stdio.h>

static int trailing_Zeroes(int n)
{
    int number = 0;
    while (n > 0) {
        number += n / 5;
         n /= 5;
    }
     return number;
}
int main(void)
{
    int n = 4;
    printf("\nNumber of trailing zeroes of factorial %d is %d ", n, trailing_Zeroes(n));
    n = 5;
    printf("\nNumber of trailing zeroes of factorial %d is %d ", n, trailing_Zeroes(n));
    return 0;
}

Sample Output:

Number of trailing zeroes of factorial 4 is 0 
Number of trailing zeroes of factorial 5 is 1 

Flowchart:

Flowchart: Find the number of trailing zeroes in a given factorial
-->

C Programming Code Editor:

Improve this sample solution and post your code through Disqus.

Previous: Write a C program to get the column number (integer value) that corresponds to a column title as appear in an Excel sheet.
Next: Write a C program to count the total number of digit 1 appearing in all positive integers less than or equal to a given integer n.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Follow us on Facebook and Twitter for latest update.