Introduction to Array

 chackButton.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View view) {
        int[] number = new int[5];
        number[0] = 10;
        number[1] = 10;
        number[2] = 10;
        number[3] = 50;
        number[4] = 10;
        int len = number.length;
        int sum = number[0]+number[1]+number[2]+number[3]+number[4];
        display.append(""+number[3]+"\narry size = "+len+"\n all jogpol = "+sum);
    }
});