Real-number meaning

rē'əl, rēl
The definition of a real number is any positive or negative number on the number line.

An example of a real number is 1/2, 0, 1, 2, 3, 4, 5, etc.

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A number that is either rational or the limit of a sequence of rational numbers.
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Any rational or irrational number not having an imaginary part.
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A number that can be written as a terminating or nonterminating decimal; a rational or irrational number. The numbers 2, −12.5,3 /7 , and pi (π) are all real numbers.
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(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 length 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.WP.

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(computing) A floating-point number.

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

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Rational number.
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Irrational number.
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Real-number Sentence Examples

  • Similarly, any rational real number is distinct from the corresponding rational number.

  • Someone took a lot of time and did a real number on him with a knife.

  • A real number is a class (a, say) of rational numbers which satisfies the condition that it is the same as the class of those rationals each of which precedes at least one member of a.

  • Accordingly this class is a real number; it will be called the real number 2 R .

  • Note that the class of rationals less than or equal tò 2r is not a real number.

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Also Mentioned In

Words near real-number in the Dictionary