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 fields, including mathematics, science, and finance, to represent quantities, measurements, and values. In the number line, positive numbers are located to the right of zero. They are essential for counting and measuring, as they indicate amounts that exist or are being added. Understanding positive numbers is fundamental in arithmetic and helps in solving real-world problems.