Can anyone help me with this Java loop problem?

Question

How do you write a program that will compute and display the sum of the factorials of the numbers from 1 to n, where n is a non-negative integer given by the user?

Example:

Input: n = 3; 1! 2! 3! = 9

Input: n = 4; 1! 2! 3! 4! = 33

Answer 1

Here is an example of a loop. This example is a sum of numbers but you should be able to see what to do.  You only need one loop though.

Also given the wiki link I think that your predicted results are wrong.  Or this is not a factorial problem.

Answer 2

function factorial(x)

{

    return ( x > 1 ? x * factorial(x - 1) : 1);

}

function FactorialSum(x)

{

    var sum = 0;

    for (var i = 0; i < x; i++)

    {

        sum += factorial(i + 1);

    }

    alert(sum);

}

Call FactorialSum() with whatever number the user entered.