Theory:

In the previous class, we have learned about natural numbers.
Natural numbers are $$1$$, $$2$$, $$3$$,…. They are also called as positive numbers.
Have you ever heard about negative numbers?

Yes, we heard these numbers in day-to-day life.
Negative numbers are $$-1$$, $$-2$$, $$-3$$,…. They come below zero.
We have also learned about whole numbers.
Whole numbers are $$0$$, $$1$$, $$2$$, …. It is also called as non-negative numbers.
Now, let us define integers.
Integers are the set of positive and negative numbers, including zero. Usually, it is written as …, $$-3$$, $$-2$$, $$-1$$, $$0$$, $$1$$, $$2$$, $$3$$, ….
3. ‘$$–$$’ symbol in front of a number is read as 'negative' or 'minus'. For example, $$-1$$ is read as minus $$1$$ or negative $$1$$.