The Infinite Real Number Line - R
All of the sets we talked about before combine, to form an infinite line containing any number you can possibly think of. These are called the real numbers.
Denoted by R, you will now come to know this set as The Set of Real Numbers.
For any point imaginable in the real number line, there will always be an infinite amount of infinitely smaller or infinitely larger numbers.
Infinity is something we humans can't even begin to understand.
Et voilà, you have learned Set Theory and the Real Number Line.