- Zero, 0, is neither positive or negative
- Any real number multiplied by 0 is 0, 0 * n = 0
- 0 divided by any real number other than 0 is 0, \frac { 0 }{ n } =0
- When n is a real number not equal to 0 itself, \frac { n }{ 0 } is undefined
- Anomaly: zero factorial, 0! = 1
Zero (Wikipedia)
| ||||
|---|---|---|---|---|
| Cardinal | 0, zero, "oh" (/oʊ/), nought, naught, nil | |||
| Ordinal | Zeroth, noughth | |||
| Divisors | All numbers | |||
| Binary | 02 | |||
| Ternary | 03 | |||
| Quaternary | 04 | |||
| Quinary | 05 | |||
| Senary | 06 | |||
| Octal | 08 | |||
| Duodecimal | 012 | |||
| Hexadecimal | 016 | |||
| Vigesimal | 020 | |||
| Base 36 | 036 | |||
| Arabic & Kurdish | ٠ | |||
| Urdu |  | |||
| Bengali | ০ | |||
| Hindu Numerals | ० | |||
| Chinese | 零, 〇 | |||
| Japanese | 零, 〇 | |||
| Khmer | ០ | |||
| Thai | ๐ | |||
0 (zero) is a number, and the numerical digit used to represent that number in numerals. It fulfills a central role in mathematics as the additive identity of the integers, real numbers, and many other algebraic structures. As a digit, 0 is used as a placeholder in place value systems. Names for the number 0 in English include zero, nought (UK), naught (US) (/nɔːt/), nil, or—in contexts where at least one adjacent digit distinguishes it from the letter "O"—oh or o (/oʊ/). Informal or slang terms for zero include zilch and zip.Ought and aught (/ɔːt/), as well as cipher, have also been used historically.