'Prince' in the Bible

Now judgment is upon this world [the sentence is being passed]. Now the ruler of this world (Satan) will be cast out.

I will not speak with you much longer, for the ruler of the world (Satan) is coming. And he has no claim on Me [no power over Me nor anything that he can use against Me];

about judgment [the certainty of it], because the ruler of this world (Satan) has been judged and condemned.