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Monday 1 December 2014

Trailing Zeroes in the factorial of a Number.

Problem:- Write a program to find the number of zeroes at the end of n!  i.e.  the number of trailing zeroes in the factorial of a number.

Solution:-

#include<stdio.h>
int main()
{
   int n,count=0,i;
    scanf("%d",&n);
        for(i=5;n/i>=1;i*=5)
            count+=n/i;
        printf("No. of zeroes at the end of %d! are:-%d\n",n,count);
return 0;
}