A number is a mathematical object used for counting, measurements, and performing calculations.
There are several types of numbers:
- Natural numbers: 1, 2, 3, …
- Integers: …, -1, 0, 1, …
- Rational numbers: 1/2, -1/4, …
- Real numbers: any number on the number line
- Complex numbers: numbers containing real and imaginary parts. ex: 4x+3