1.NounThe limit of a convergent sequence of rational numbers, whether the limit is a rational number such as 2, -5, or 2/7 or whether the limit is an irrational number such as the square root of two or the circumference of the circle whose radius is one.
"Every integer is a real number, but not vice versa.; A real number can be regarded abstractly as an equivalence class of Cauchy sequences of real numbers."
2.NounA floating-point number.
"Even if you pass sqrt an integer, it returns a real number."