AccountBalance

String input = scanner.nextLine();
        double sum = 0.0;

        while (!input.equals("NoMoreMoney")) {
            double currentNum = Double.parseDouble(input);   // not (scanner.nextLine())  !!! ???
            if (currentNum < 0) {
                System.out.println("Invalid operation!");
                break;
            }
            System.out.printf("Increase: %.2f%n", currentNum);
            sum += currentNum;

            input = scanner.nextLine();
        }
        System.out.printf("Total: %.2f", sum);