#include<stdio.h>
int facto(int n)
{
	if(n == 0)
	{
		return 1;
	}
	else if(n == 1)
	{
		return 1;
	}
	else
	{
		return n * facto(n-1);
	}
}

int main()
{
	int n,ans;
	printf("Enter the number to find factorial: ");
	scanf("%d",&n);
	ans = facto(n);
	printf("%d ! = %d",n,ans);
	getch();
	return(0);
}