There are different types of numbers: they could be
natural numbers, whole numbers, rationals, real numbers and integers. Integers
are a set of numbers consisting of positive and negative numbers excluding
decimals and fractions. The following are its characteristics:
Negative numbers mean numbers that are below zero.
Zero is part of the set of integers.
Number categories overlap with each other.
When writing a set of integers, they must be inside
a bracket ‘{}’ and with ellipses “…”.
*When adding or subtracting integers, use a number
line.
