Question

I am making a button that when pressed it multiplies a number by two but i keep getting an error saying invalid assignment operator and the red is underling the * which should mean multiply in java right?

mult.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        ---->   counter  *2;
        display.setText("Your total is " + counter);
    }
});

Answer 1

Presuming there’s no code before the counter * 2, it should either be counter = counter * 2; or counter *=2; You’re not actually setting anything just by saying * 2 😛

Hopefully counter is a global variable so that it’s actually saved outside of the method haha.