In the list of whole numbers 0, 1, 2, 3, ..., what does the three-dot symbol at the end mean?

1. The three dots written after 0, 1, 2, 3 are called an ellipsis. 2. An ellipsis means "and so on," telling the reader the pattern keeps going. 3. So the whole numbers do not stop; they continue endlessly past any number written down. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 1 "Foundations", section 1.1 Introduction to Whole Numbers_