Factorial of a number

Write a program to  find factorial of an entered number.

#include<stdio.h>
unsigned long long Factorial(unsigned int);
int main()
{
	int num,i;
	unsigned long long Factorial_of_Number;
	printf("Enter Number = ");
	scanf("%d",&num);
	if(num > 0)
	{
		Factorial_of_Number = Factorial(num);
		for(i = num;i>1;i--)
		{
			printf("%2d x",i);
		}
		printf(" 1 = %llu\n",Factorial_of_Number);
		printf("\nFactorial of %d is = %llu\n",num,Factorial_of_Number);
	}
	else
	{
		printf("Factorial of %d doesn`t exist\n",num);
	}
	return 0;
}
unsigned long long Factorial(unsigned int n)
{
	unsigned long long fact = 1;
	for(;n;n--)
	{
		fact = fact * n;
	}
	return fact;
}

Output

Enter Number = 8
8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 40320
Factorial of 8 is = 40320

Enter Number = 15
15 x14 x13 x12 x11 x10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1 = 1307674368000
Factorial of 15 is = 1307674368000