0

See also o, O, and Appendix:Variations of "o"

Translingual

Unicode name	DIGIT ZERO
Codepoint	U+0030
/ ← Basic Latin → 1

Wikipedia

Etymology

०
Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numeral ٠ (compare Devanāgarī script ०), adopted for use with the Latin script in Europe as ‘0’.

Symbol

0

1. (Arabic digits) The cardinal number zero indicating absence of any quantity.
2. A digit in decimal, binary, and every other base numbering system.

   15 × 134 = 2010

   0000 0001₂

   0x1000E001 (hexadecimal notation)

3. (mathematics) The identity element with respect to addition.

   $\exists\,\mathbf{0}:\forall a\in A:\mathbf{0}+a=a+\mathbf{0}=a$

4. (mathematics, computer science) A Boolean or truth value corresponding to false.

   f : B^k → B : B = {0, 1}

   A&B&C=0 → A=0 || B=0 || C=0

Coordinate terms

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

Alternative forms

Arabic (Eastern) numerals: ٠ Arabic (Western) numerals: 0 Bengali numerals: ০ Chinese numerals: 零 , 〇 Ethiopic numerals: n/a Gujarati numerals: ૦ Gurmukhi numerals: ੦ Hebrew numerals: n/a Hindi numerals: ०

Kannada numerals: ೦ Khmer numerals: ០ Lao numerals: ໐ Limbu numerals: ᥆ Malayalam numerals: ൦ Mongolian numerals: ᠐ Myanmar numerals: ၀ Ol Chiki numerals: ᱐ Oriya numerals: ୦

Osmanya numerals: 𐒠 Persian numerals: ۰ Roman numerals: n/a Saurashtra numerals: ꣐ Sundanese numerals: ᮰ Tamil numerals: ೦ Telugu numerals: ౦ Thai numerals: ๐ Tibetan numerals: ༠

Derived terms

Derived terms

(select cardinal numbers containing ‘0’) 10, 20, 30, ..., 100, 101, 102, ..., 1000, ..., 10,000, 100,000, 1,000,000, ... (other select numbers containing ‘0’) -10, -1.01, -0.1, ..., 0.1, 0.01, 0.001, ... (select currency expressions containing ‘0’) $0, $0.01, $1.00

See also

Other representations of 0:

Morse code: ––––– Braille: ⠚

Signal flag (ICS and NATO):

Semaphore: After showing "numeric"

• Styles
• 

  The digit ‘0’ in a digital seven segment display.

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English

Pronunciation

• (number, digit, “zero”):
  • (Australia, US) enPR: zē'rō, IPA: /ˈziːrəʊ/, X-SAMPA: /"zi:r@U/
  • (RP) IPA: /ˈzɪərəʊ/, X-SAMPA: /"zI@r@U/

  • Audio (US)

    (file)

    Rhymes: -ɪərəʊ

• (digit, “oh”):
  • (Australia, US) IPA: /oʊ/, X-SAMPA: /oU/
  • (RP) IPA: /əʊ/, X-SAMPA: /@U/

    Rhymes: -əʊ

  The pronunciation as a digit is very often shortened to that of the letter O to save time or keep rhythm. This change is required for the tens place of minutes following the hour and in shortened pronunciation of numbers between 10 and 19 hundred, including years, as well as their truncated two-digit forms, where the zero is a leading digit. It is also very common when saying telephone numbers, decimals after the decimal point, the leading zero in decimal fractions less than one, or many other words such as 007.

Noun

0 (plural 0s)

1. 0.
2. The origin, starting point, or fixed reference point, especially for a measurement.

   The 0 for the Celsius scale is 273.15 Kelvin.

3. (electrical engineering) The off or low bit state.

   If the NOT gate input is 1, the output is 0.

Derived terms

• 0th, the ordinal number form

See also

• 0 (number) in Wikipedia
• 1