real number

Wikipedia

English

Noun

real number (plural real numbers)

1. (mathematics) An element of the set of real numbers.; the set of real numbers include the rational numbers and the irrational numbers, but not all complex numbers.

   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

2. (computing) A floating-point number.

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

Antonyms

• imaginary number

Hyponyms

• rational number
• irrational number

Hypernyms

• complex number

Derived terms

• real number system

Translations

element of the real numbers

• Armenian: իրական թիվ (hy) (irakan t’iv) 
• Catalan: nombre real (ca) m
• Chinese:

  Mandarin: 實數 (cmn), 实数 (cmn) (shíshù)

• Czech: reálné číslo (cs) n
• Dutch: reëel getal (nl) n
• Esperanto: reela nombro (eo)
• Finnish: reaaliluku (fi)
• French: nombre réel (fr) m
• German: reelle Zahl (de) f
• Greek: πραγματικός αριθμός (el) (pragmatikós arithmós) m 
• Hungarian: valós szám (hu)
• Icelandic: rauntala (is) f
• Irish: réaduimhir (ga) f

• Japanese: 実数 (じっすう, jissū)
• Latvian: reāls skaitlis (lv) m
• Norwegian: reelt tall (no) n
• Polish: liczba rzeczywista (pl) f
• Portuguese: número real (pt) m
• Romanian: număr real (ro) n
• Russian: вещественное число n
• Serbo-Croatian:

  Cyrillic: реaлни брой (sh) m

  Roman: realni broj (sh) m

• Spanish: número real (es) m
• Swedish: reellt tal (sv) n
• Turkish: gerçek sayı (tr), reel sayı (tr), gerçel sayı (tr)

floating-point number — see floating-point number

See also

• hyperreal number
• imaginary number
• surreal number
• transfinite number