Question

Given a number n. The task is to find the unit digit of factorial of given number n.

Answer 1

Answer:

Step-by-step explanation:4686

Answer 2

Answer:

int findDigits(int n)  

{  

   // factorial exists only for n>=0  

   if (n < 0)  

       return 0;  

 

   // base case  

   if (n <= 1)  

       return 1;  

 

   // else iterate through n and calculate the  

   // value  

   double digits = 0;  

   for (int i=2; i<=n; i++)  

       digits += log10(i);  

 

   return floor(digits) + 1;  

}

Step-by-step explanation: