👉 In mathematics, a nonnegative number is a real number that is greater than or equal to zero. This means that it can be written as a fraction with a positive integer numerator and a positive denominator. For example, 4, -3, and 0 are all nonnegative numbers. The set of all nonnegative numbers forms the set of integers. Nonnegation, on the other hand, is a property of real numbers that says a number x must be greater than or equal to zero