A positive number is any number that is greater than zero. This includes whole numbers like 1, 2, and 3, as well as fractions and decimals such as 0.5 and 3.14. Positive numbers are used in various everyday situations, such as counting objects or measuring distances. In mathematics, positive numbers are often represented on the right side of the number line, where they increase in value as you move away from zero. They are essential in many fields, including science, finance, and engineering, where they help quantify and describe real-world phenomena.