English Dictionary

real number

noun

(mathematics) The 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.

The real number line extends infinitely in both directions.

意味（1）

(mathematics) The 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.

意味（2）

(computing) A floating-point number.

Even if you pass sqrt an integer, it returns a real number.