1

See also: 1̂, !1, 1., l, ӏ, I, and Ӏ

1 U+0031, 1 DIGIT ONE ← 0 [U+0030] Basic Latin 2 → [U+0032]

Variations

¹ U+00B9, ¹ SUPERSCRIPT ONE ← ¸ [U+00B8] Latin-1 Supplement º → [U+00BA]

₁ U+2081, ₁ SUBSCRIPT ONE ← ₀ [U+2080] Superscripts and Subscripts ₂ → [U+2082]

１ U+FF11, １ FULLWIDTH DIGIT ONE ← ０ [U+FF10] Halfwidth and Fullwidth Forms ２ → [U+FF12]

𝟏 U+1D7CF, 𝟏 MATHEMATICAL BOLD DIGIT ONE ← 𝟎 [U+1D7CE] Mathematical Alphanumeric Symbols 𝟐 → [U+1D7D0]

𝟙 U+1D7D9, 𝟙 MATHEMATICAL DOUBLE-STRUCK DIGIT ONE ← 𝟘 [U+1D7D8] Mathematical Alphanumeric Symbols 𝟚 → [U+1D7DA]

𝟣 U+1D7E3, 𝟣 MATHEMATICAL SANS-SERIF DIGIT ONE ← 𝟢 [U+1D7E2] Mathematical Alphanumeric Symbols 𝟤 → [U+1D7E4]

𝟭 U+1D7ED, 𝟭 MATHEMATICAL SANS-SERIF BOLD DIGIT ONE ← 𝟬 [U+1D7EC] Mathematical Alphanumeric Symbols 𝟮 → [U+1D7EE]

𝟷 U+1D7F7, 𝟷 MATHEMATICAL MONOSPACE DIGIT ONE ← 𝟶 [U+1D7F6] Mathematical Alphanumeric Symbols 𝟸 → [U+1D7F8]

Contents

Translingual

Etymology

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.

Symbol

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

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.

Alternative forms

• Arabic (Eastern) numerals: ١‎
• Arabic (Western) numerals: 1
• Assamese numerals: ১
• Balinese numerals: ᭑
• Bengali numerals: ১
• Chakma numerals: 𑄷
• Cham numerals: ꩑
• Chinese numerals: 壹 , 一
• Devanagari numerals: १
• Egyptian numerals: 𓏺
• Ethiopic numerals: ፩
• Greek numerals: Α΄
• Gujarati numerals: ૧
• Gurmukhi numerals: ੧
• Hebrew numerals: א‎

• Javanese numerals: ꧑
• Kannada numerals: ೧
• Kayah Li numerals: ꤁
• Khmer numerals: ១
• Khudawadi numerals: 𑋱
• Lao numerals: ໑
• Lepcha numerals: ᱁
• Limbu numerals: ᥇
• Malayalam numerals: ൧
• Meitei numerals: ꯱
• Mongolian numerals: ᠑
• Myanmar numerals: ၁
• N'Ko numerals: ߁‎‎
• Ol Chiki numerals: ᱑
• Old Persian numerals: 𐏑

• Oriya numerals: ୧
• Osmanya numerals: 𐒡
• Persian numerals: ۱‎
• Roman numerals: I
• Saurashtra numerals: ꣑
• Sharada numerals: 𑇑
• Sinhalese numerals: ෧ , (archaic) 𑇡
• Sundanese numerals: ᮱
• Takri numerals: 𑛁
• Tamil numerals: ௧
• Telugu numerals: ౧
• Thai numerals: ๑
• Tibetan numerals: ༡
• Tirhuta numerals: 𑓑
• Warang Citi numerals: 𑣡

Derived terms

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 also

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

See also

• 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"

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English

Pronunciation

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

• Audio (US)

  (file)

• Rhymes: -ʌn

Symbol

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

Synonyms

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

Derived terms

• (ordinal) 1st

Translations

deliberate misspelling of !

• Hungarian: 4 (hu)

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American Sign Language

Numeral

1 (transliteration needed)

1. one

Noun

1 (transliteration needed)

1. A metasyntactic variable used to denote a person.

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Chinese

Pronunciation

• Mandarin

  (Pinyin): yī (yi¹)

  (Zhuyin): ㄧ

• Cantonese (Jyutping): jat¹

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• Mandarin
  • (Standard Chinese)⁺
    • Pinyin: yī
    • Zhuyin: ㄧ
    • Wade–Giles: i¹
    • Gwoyeu Romatzyh: i
    • IPA ^(key): /i⁵⁵/
• Cantonese
  • (Standard Cantonese, Guangzhou)⁺
    • Jyutping: jat¹
    • Yale: yāt
    • Cantonese Pinyin: jat⁷
    • Guangdong Romanization: yed¹
    • IPA ^(key): /jɐt̚⁵/

Noun

1

1. (gay slang) top

Related terms

• 0 (líng)
• 0.5 (língdiǎnwǔ)

Derived terms

• 10 (yīlíng)