All real numbers are classified into different number sets. Within the category of real numbers, we have the following subsets of numbers.
|r|l|
[-0.8em]
-3pt Type of& [-0.5em] Number & & Number Set -5pt [0.4em]
[-0.8em]
-3pt Whole& [-0.5em] Numbers & & -3pt { ,1,2, ... } -3pt [0.4em]
[-0.8em]
Integers & -3pt { ..., -1, ,1,2, ...} -3pt [0.4em]
[-0.8em]
-3pt Rational& [-0.5em] Numbers & & -3pt { ..., - 32,-1, ,1,2, ...} -3pt [0.6em]
[-0.8em]
-3pt Real& [-0.5em] Numbers & & -3pt { ..., - 32,-1, ,1,sqrt(2),2,Ď€ , ...} -3pt [0.6em]
As we can see, the whole numbers are part of the integers, the integers are a part of the rational numbers, and the rational numbers are a part of the real numbers. Another way to represent these sets is with a Venn diagram.
As we can see, the whole numbers exclude negative numbers. Therefore a whole number is never negative.
