A positive number is a number greater than 0. Positive numbers are often preceded by a "+"sign, which can usually be omitted. There are countless kinds of positive numbers, including positive integers, positive fractions and positive irrational numbers. Geometric meaning of positive numbers: all points representing positive numbers on the number axis are on the right side of 0 on the number axis. A negative number is a mathematical term that refers to a real number less than 0, which is the opposite of a positive number with the same absolute value. Any positive number preceded by a negative sign is equal to a negative number. On the number axis, negative numbers are all to the left of 0.