1

See also: 1̂, !1, 1., l, ӏ, I, and Ӏ

Contents

TranslingualEdit

Unicode name	DIGIT ONE
Unicode block	Basic Latin
Codepoint	U+0031
0 ← Basic Latin → 2

EtymologyEdit

Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ ‎(1, “éka”)), possibly influenced by Roman numeral Ⅰ.

SymbolEdit

1

1. The cardinal number one, a single thing or unit.
2. A digit in decimal and every other base numbering system, including binary, octal, and hexadecimal.

   15 × 134 = 2010

   0010 0011₂

   0x1000E001

3. (mathematics) The identity element with respect to multiplication in a ring.

   a×1 = a

4. (computer science) Bit state corresponding to binary digit 1, or on or true.
5. (mathematics) A Boolean or truth value corresponding to true.

   f : B^k → B : B = {0, 1}

6. (mathematics) The one-point topological space, trivial ring, trivial group, a category with a single object or a (canonical) singleton.
7. (mathematics, set theory) indicator function of a set.

See alsoEdit

• (Arabic digits): 0 1 2 3 4 5 6 7 8 9

Alternative formsEdit

Arabic (Eastern) numerals: ١ Arabic (Western) numerals: 1 Balinese numerals: please add, if you can Bengali numerals: ১ Chinese numerals: 壹 , 一 Devanagari numerals: १ Ethiopic numerals: ፩ Gujarati numerals: ૧ Gurmukhi numerals: ੧ Hebrew numerals: א

Javanese numerals: please add, if you can Kannada numerals: ೧ Khmer numerals: ១ Lao numerals: ໑ Limbu numerals: ᥇ Malayalam numerals: ൧ Mongolian numerals: ᠑ Myanmar numerals: ၁ Ol Chiki numerals: ᱑ Oriya numerals: ୧

Osmanya numerals: 𐒡 Persian numerals: ۱ Roman numerals: I Saurashtra numerals: ꣑ Sinhalese numerals: please add, if you can Sundanese numerals: ᮱ Tamil numerals: ௧ Telugu numerals: ౧ Thai numerals: ๑ Tibetan numerals: ༡

Derived termsEdit

Derived terms

(select cardinal numbers containing ‘1’) 10, 11, 12, ..., 100, 101, 102, ..., 1000, ..., 10,000, 100,000, 1,000,000, ... (other select numbers containing ‘1’) -10, -1, -0.1, ..., 0.1, 0.01, 0.001, ... +1

See alsoEdit

• 1 (number) in Wikipedia

Other representations of 1:

Morse code: ·–––– Braille: ⠁ ASL Manual: 1@Side-PalmBack

Signal flag (ICS and NATO):

Semaphore: After showing "numeric"

• Styles
• 

  The digit ‘1’ in a digital seven segment display.

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EnglishEdit

PronunciationEdit

• enPR: wŭn, IPA^(key): /wʌn/, IPA^(key): /wan/

• Audio (US)

  (file)

• Rhymes: -ʌn

SymbolEdit

1

1. The number one (1).
2. (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !, imitating someone who is too excited to consistently press the shift key while typing exclamation marks.

   A: sum1 hlep me plz im alwyz l0zin!!1!?!/?

   B: Thts bcuz ur st00pid!!!!!11!!oneone!!1!!eleven!1

TranslationsEdit

deliberate misspelling of !

• Hungarian: 4 (hu)

Derived termsEdit

• (ordinal) 1st

SynonymsEdit

• (sarcastic, deliberate misspelling of !): one, eleven

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American Sign LanguageEdit

NumeralEdit

1

1. one

NounEdit

1

1. A metasyntactic variable used to denote a person.

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ChineseEdit

PronunciationEdit

• Mandarin

  (Pinyin): yī (yi¹)

  (Zhuyin): ㄧ

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• Mandarin
  • (Standard Chinese, Beijing)⁺
    • Pinyin: yī
    • Zhuyin: ㄧ
    • Wade-Giles: i¹
    • Gwoyeu Romatzyh: i
    • IPA ^(key): /i⁵⁵/

NounEdit

1

1. (slang) top (gay slang)

Derived termsEdit

• 10