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Function or functionality may refer to:


Computing

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Function key A function key is a key on a computer or terminal keyboard that can be programmed so as to cause an operating system command interpreter or application program to perform certain actions, a form of soft key. On some keyboards/computers, function ...
, a type of key on computer keyboards *
Function model In systems engineering, software engineering, and computer science, a function model or functional model is a structured representation of the functions ( activities, actions, processes, operations) within the modeled system or subject area.
, a structured representation of processes in a system *
Function object In computer programming, a function object is a construct allowing an object to be invoked or called as if it were an ordinary function, usually with the same syntax (a function parameter that can also be a function). Function objects are often ca ...
or functor or functionoid, a concept of object-oriented programming *
Function (computer programming) In computer programming, a function or subroutine is a sequence of program instructions that performs a specific task, packaged as a unit. This unit can then be used in programs wherever that particular task should be performed. Functions may ...
, or subroutine, a sequence of instructions within a larger computer program


Music

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Function (music) In music, function (also referred to as harmonic function) is a term used to denote the relationship of a chord"Function", unsigned article, ''Grove Music Online'', . or a scale degree to a tonal centre. Two main theories of tonal functions exis ...
, a relationship of a chord to a tonal centre *
Function (musician) David Charles Sumner (born 1 December 1973), who records as Function, is an American techno DJ and Record producer, producer. Born in the Canarsie area of Brooklyn in New York City Sumner's early musical interests included Kraftwerk, Afrika Bamb ...
(born 1973), David Charles Sumner, American techno DJ and producer * "Function" (song), a 2012 song by American rapper E-40 featuring YG, Iamsu! & Problem * "Function", song by Dana Kletter from '' Boneyard Beach'' 1995


Other uses

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Function (biology) In evolutionary biology, function is the reason some object or process occurred in a system that evolved through natural selection. That reason is typically that it achieves some result, such as that chlorophyll helps to capture the energy of sun ...
, the effect of an activity or process *
Function (engineering) In engineering, a function is interpreted as a specific process, action or task that a system is able to perform.R.Barker, C. Longman, Case Method: Function and Process Modelling, Addison-Wesley Professional, 1992. In engineering design In the l ...
, a specific action that a system can perform *
Function (language) Functional linguistics is an approach to the study of language characterized by taking systematically into account the speaker's and the hearer's side, and the communicative needs of the speaker and of the given language community. Linguistic fun ...
, a way of achieving an aim using language *
Function (mathematics) In mathematics, a function from a set to a set assigns to each element of exactly one element of .; the words map, mapping, transformation, correspondence, and operator are often used synonymously. The set is called the domain of the funct ...
, a relation that associates an input to a single output *
Function (sociology) Structural functionalism, or simply functionalism, is "a framework for building theory that sees society as a complex system whose parts work together to promote solidarity and stability". This approach looks at society through a macro-level o ...
, an activity's role in society *
Functionality (chemistry) In chemistry, functionality is the presence of functional groups in a molecule. A monofunctional molecule possesses one functional group, a difunctional two, a trifunctional three, and so forth. In organic chemistry (and other fields of chemis ...
, the presence of functional groups in a molecule *
Party A party is a gathering of people who have been invited by a host for the purposes of socializing, conversation, recreation, or as part of a festival or other commemoration or celebration of a special occasion. A party will often feature f ...
or function, a social event *
Function Drinks Function Drinks is a Functional Beverage company based in Los Angeles, California. The company was founded in 2004 by spine surgeonbr>Dr. Alex Hughes along with Josh Simon and Dayton Miller. The team launched their first product, Urban Detox, in ...
, an American beverage company


See also

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Function field (disambiguation) Function field may refer to: *Function field of an algebraic variety *Function field (scheme theory) *Algebraic function field *Function field sieve *Function field analogy This is a glossary of arithmetic and diophantine geometry in mathematics, a ...
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Function hall Function or functionality may refer to: Computing * Function key, a type of key on computer keyboards * Function model, a structured representation of processes in a system * Function object or functor or functionoid, a concept of object-oriente ...
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Functional (disambiguation) Functional may refer to: * Movements in architecture: ** Functionalism (architecture) ** Form follows function * Functional group, combination of atoms within molecules * Medical conditions without currently visible organic basis: ** Functional s ...
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Functional group (disambiguation) The term functional group may have several meanings: *Functional group, in organic chemistry, a group of atoms responsible for the characteristic chemical reactions of a molecule *Functional group (ecology), a collection of organisms *The Party of ...
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Functionalism (disambiguation) Functionalism may refer to: * Functionalism (architecture), the principle that architects should design a building based on the purpose of that building * Functionalism in international relations, a theory that arose during the inter-War period * ...
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Functor (disambiguation) A functor, in mathematics, is a map between categories. Functor may also refer to: * Predicate functor in logic, a basic concept of predicate functor logic * Function word in linguistics * In computer programming: ** Functor (functional programmin ...
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