#include <stdio.h>
int factorial(int x);
main()
{
	int i;
	printf("Please enter a value to calculate its factorial\n");
	scanf("%d",&i);
	i=factorial(i);
	printf("The factorial is ---> %d",i);
}

int factorial(int x)
{
	if (x==1)
	{
		return 1;
	}
	else
	{
		return(x*factorial(x-1));
	}
}