#include<stdio.h>
int fact(int n)
{
    if(n==0){
        return 1;
    }
    else
    {
        return n*fact(n-1);
    }
}
    int main()
    {
        int number,result;
        printf("enter the number:\n");
        scanf("%d",&number);
        result=fact(number);
        printf("fact of n:%d",result);
    }