👉 In mathematics, "realness" refers to properties that can be directly measured or verified by human observation. Real numbers are those values that can be accurately represented as a floating point number in a computer system without error. Real numbers include integers, fractions (including decimal and fractional), rational numbers, irrational numbers, and complex numbers, among others. The set of real numbers is closed under addition, subtraction, multiplication, division, and exponentiation, which means that any two real numbers can be added
