Assignement.java

    public static void main(String[] args) {
        System.out.print("Unsorted Random Array: ");

        Random x = new Random();

        int [] arr = new int [10];
        for (int a = 0; a <= 7; a++) {
            arr[a] = x.nextInt(5); // Change bound from 4 -> 5 since it is exclusive.
            if(a<7){
                System.out.print(arr[a]+", ");
            }
            else if (a>=7){
                System.out.println(arr[a]);
            }

        }

        //Call new method
        addFirstFor(arr);
    }

    /**
     * Method that accepts the array as an argument
     *
     * @param arr
     */
    public static void addFirstFor(int[] arr) {
        int sum = 0;
        for(int x = 0; x < 4; x++) {
            sum = sum + arr[x];
        }
        arr[4] =sum; //Add the sum to the fourth index
        System.out.println("Added: " + sum + " to index 4.");
        System.out.println(Arrays.toString(arr)); // Use Arrays.toString to print a readable Array
    }