@Test
    public void charTest(){

        for (char input= 'A'; input <= 'z'; input++){
            if (input >= 'A' && input <= 'Z'){
                System.out.println( input + " is char.");
            }else if (input >= 'a' && input <= 'z'){
                System.out.println( input + " is char.");
            }else {
                System.out.println( input + " is not char.");
            }
        }

    }