Unary may refer to: *Unary numeral system, the simplest numeral system to represent natural numbers *Unary function, a function that takes one argument; in computer science, a unary operator is a subset of unary function *Unary operation, a kind of mathematical operator that has only one operand *Unary relation, a mathematical relation that has one argument *Unary coding, an entropy encoding that represents a number ''n'' with n − 1 ones followed by a zero See also * Primary (other) * Binary (other) {{Disambiguation ...

The unary numeral system is the simplest numeral system to represent natural numbers: to represent a number ''N'', a symbol representing 1 is repeated ''N'' times. In the unary system, the number 0 (zero) is represented by the empty string, that is, the absence of a symbol. Numbers 1, 2, 3, 4, 5, 6, ... are represented in unary as 1, 11, 111, 1111, 11111, 111111, ... Unary is a Bijective numeration, bijective numeral system. However, although it has sometimes been described as "base 1", it differs in some important ways from positional notations, in which the value of a digit depends on its position within a number. For instance, the unary form of a number can be exponentially longer than its representation in other bases. The use of tally marks in counting is an application of the unary numeral system. For example, using the tally mark (𝍷), the number 3 is represented as . In East Asian cultures, the number 3 is represented as wikt:三#Translingual, 三, a character drawn w ...

Unary may refer to: *Unary numeral system, the simplest numeral system to represent natural numbers * Unary function, a function that takes one argument; in computer science, a unary operator is a subset of unary function *Unary operation Unary may refer to: *Unary numeral system, the simplest numeral system to represent natural numbers *Unary function, a function that takes one argument; in computer science, a unary operator is a subset of unary function *Unary operation, a kind of ..., a kind of mathematical operator that has only one operand * Unary relation, a mathematical relation that has one argument * Unary coding, an entropy encoding that represents a number ''n'' with n − 1 ones followed by a zero See also * Primary (other) * Binary (other) {{Disambiguation ...

Primary or primaries may refer to: Arts, entertainment, and mediaMusicGroups and labels * Primary (band), from Australia * Primary (musician), hip hop musician and record producer from South Korea * Primary Music, Israeli record label Works * ''Primary'' (album) by Rubicon (2002) * "Primary" (song) by The Cure * "Primary", song by Spoon from the album '' Telephono'' * "Primary", instrumental by Van Halen from the album '' Van Halen III'' Other uses in arts, entertainment, and media * Primaries or primary beams, in E. E. Smith's science-fiction series '' Lensman'' * ''Primary'' (film), American political documentary (1960) Computing * PRIMARY, an X Window selection * Primary data storage, computer technology used to retain digital data * Primary server, main server on the server farm Education * Primary education, the first stage of compulsory education * Primary FRCA, academic examination for anaesthetists in the U.K. * Primary school, school providing primary educati ...