0
Number / From Wikipedia, the free encyclopedia
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0 (zero) is a number representing an empty quantity. In place-value notation such as the Hindu–Arabic numeral system, 0 also serves as a placeholder numerical digit, which works by multiplying digits to the left of 0 by the radix, usually by 10. As a number, 0 fulfills a central role in mathematics as the additive identity of the integers, real numbers, and other algebraic structures.
| ||||
|---|---|---|---|---|
| Cardinal | 0, zero, "oh" (/oʊ/), nought, naught, nil | |||
| Ordinal | Zeroth, noughth, 0th | |||
| Binary | 02 | |||
| Ternary | 03 | |||
| Senary | 06 | |||
| Octal | 08 | |||
| Duodecimal | 012 | |||
| Hexadecimal | 016 | |||
| Arabic, Kurdish, Persian, Sindhi, Urdu | ٠ | |||
| Hindu Numerals | ० | |||
| Chinese | 零, 〇 | |||
| Khmer | ០ | |||
| Thai | ๐ | |||
| Bangla | ০ | |||
Common names for the number 0 in English are zero, nought, naught (/nɔːt/), nil. In contexts where at least one adjacent digit distinguishes it from the letter O, the number is sometimes pronounced as oh or o (/oʊ/). Informal or slang terms for 0 include zilch and zip. Historically, ought, aught (/ɔːt/), and cipher, have also been used.