No come on, you are starting to piss me off here. Why don't you apply one single bit of thinking to your problems.
At the moment you have a line that says:-
if ( ! digitalRead(buttonInt) ) return;
and you want to return if another different button is pressed.
So you have the same line again only looking at the different button, or you use the logic OR function || and combine to looks at the button into one line.
There comes a time when hand holding turns into a dependent situation. Are you going to just have a knee jerk reaction to everything you don't immediately understand? At the end of the day you are trying to develop some skills, every one starts out with zero knowledge and it is fine to ask, but to ask repeatedly without even thinking about it is not good.