# Whole Numbers

We have seen that the number 1 has no predecessor in natural numbers. **To the collection of natural numbers we add zero** as the **predecessor** for 1. This new set of numbers is called as

The natural numbers along with zero form the collection of whole numbers.

## Try These

**Are all natural numbers also whole numbers?**

2. **Are all whole numbers also natural numbers?**

3. **Is there a greatest whole number?**

Previously we have learnt to perform all the basic operations like addition, subtraction, multiplication and division on numbers. We also know how to apply them to problems. Let us try them on a number line. Before we proceed, let us find out what a number line is!