natural number From Wikipedia, the free encyclopedia
One (1) is the first natural number, followed by two. The Roman numeral for one is I.
| ||||
---|---|---|---|---|
Cardinal | one, ieh /ˈaɪ/, unit, unity | |||
Ordinal | 1st (first) | |||
Numeral system | unary | |||
Factorization | 1 | |||
Divisors | 1 | |||
Greek numeral | Α´ | |||
Roman numeral | I | |||
Roman numeral (unicode) | Ⅰ, ⅰ | |||
Greek prefix | mono- /haplo- | |||
Latin prefix | uni- | |||
Binary | 12 | |||
Ternary | 13 | |||
Quaternary | 14 | |||
Quinary | 15 | |||
Senary | 16 | |||
Octal | 18 | |||
Duodecimal | 112 | |||
Hexadecimal | 116 | |||
Vigesimal | 120 | |||
Base 36 | 136 | |||
Greek numeral | α' | |||
Persian | ١ - یک | |||
Arabic | ١ | |||
Urdu | ||||
Ge'ez | ፩ | |||
Bengali & Assamese | ১ | |||
Chinese numeral | 一,弌,壹 | |||
Korean | 일, 하나 | |||
Devanāgarī | १ | |||
Telugu | ೧ | |||
Tamil | ௧ | |||
Kannada | ೧ | |||
Hebrew | א (alef) | |||
Khmer | ១ | |||
Thai | ๑ | |||
Malayalam | ൧ | |||
Counting rod | 𝍠 |
In mathematics, the number one is the multiplicative identity.[1] It is also the only number for which these special facts are true:
In mathematics, 0.999... is a repeating decimal that is equal to 1. Many proofs have been made to show this is correct.[2][3]
One is important for computer science, because the binary numeral system uses only ones and zeroes to represent numbers. In machine code and many programming languages, one means "true" (or "yes") and zero means "false" (or "no").
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.