Which is larger: the sum of evens or the sum of odds? Does the answer to this question change if the limit value is even or odd?
Perhaps you should run the program to find out.
You have probably encountered the definition of N Factorial:
N Factorial == N! == N * (N-1) * (N-2) * (N-3) * . . . 4 * 3 * 2 * 1
For example,
6! == 6 * 5 * 4 * 3 * 2 * 1 == 720
Here are a few other parts to the definition: N must be a positive integer, and 0! is defined to be 1.
Let us write a program that computes N! for a value of N. The program checks that N is positive (including zero), then computes the factorial.