Theory:

In the previous class, we learned about natural numbers.
Natural numbers are \(1\), \(2\), \(3\),…. It is also called as positive numbers.
Have you ever heard about negative numbers?
 
Yes, we heard these numbers in day-to-day life.
Example:
1. The average temperature in the Antarctic Plateau is 56.7°C.
 
2. Your account balance is \(-100\) rupees.
Negative numbers are \(-1\), \(-2\), \(-3\),…. It comes below zero.
Now, we define integers.
Integers are the set of positive and negative numbers, including zero. Usually, it is written as …, \(-3\), \(-2\), \(-1\), \(0\), \(1\), \(2\), \(3\), ….
Let's see about the sign of integers.
The opposite of every positive number is the same number with a negative sign.
Example:
1. The opposite of \(5\) is \(-5\).
 
2. The opposite of \(10\) is \(-10\).
 
3. The opposite of \(-15\) is \(15\).
Important!
The opposite of \(0\) is \(0\). This is because zero is neither positive nor negative.