There are a finite number of numbers that we use in both mathematics and real-world situations. Several numbers can be used interchangeably (real numbers), while some have stringent rules and regulations (complex numbers).
- Real numbers – numbers that can be identified on a number line and can be used to measure distance.
- Complex numbers – numbers with both a real and imaginary component, therefore, cannot be identified on the number line.
It is important to be sure that each real number is correctly used. To properly use real numbers, a system identifies the properties of each type of number. This classification system is called the real number system.
The real number system is a system that separates all numbers into five categories.
- Rational numbers
- Integers
- Whole numbers
- Natural or counting numbers
- Irrational numbers
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