Question

plz help..how to find factorial of 5!-4!+3!-2!+1! by using c# or c++ and also display the series as well.. its urgent kindly need help

Answer 1

approach this problem by writing a factorial function first, then you can call a number to the function to be factored

Answer 2

As helpme indicated, write a factorial function first.

factorial(n) =
if n == 0 return 1
else return n * factorial(n-1)

Now it's a simple matter. What is next?

(Note: This is an efficient solution to the factorial problem; it is using tail recursion, when a simple loop would be possible. However, note that many modern compilers will recognize tail recursion and convert it into a simple loop automatically.)