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Meaning of FUNCTION

Pronunciation:  'fungkshun

 
Matching Terms:  function application, function call, function complete, function graph language, function key, function point analysis, function word, functional, functional calculus, functional capacity, functional database, functional dependency, functional disorder, functional disorders, functional genomics, functional group, functional groups, functional incontinence, functional language, functional magnetic resonance imaging, functional program, functional programming, functional programming language, functional requirements, functional residual capacity, functional specification, functional testing, functional unit, functionalism, functionalist, functionality, functionalize, functionally, functionally illiterate, functional-processual approach, functionary, functioning, functionless

Computing Dictionary
 
 Definition: 

1. (Or "map", "mapping") If D and C are sets (the domain and codomain) then a function f from D to C, normally written "f : D -> C" is a subset of D x C such that:

1. For each d in D there exists some c in C such that (d,c) is an element of f. I.e. the function is defined for every element of D.

2. For each d in D, c1 and c2 in C, if both (d,c1) and (d,c2) are elements of f then c1 = c2. I.e. the function is uniquely defined for every element of D.

See also image, inverse, partial function.

2. Computing usage derives from the mathematical term but is much less strict. In programming (except in functional programming), a function may return different values each time it is called with the same argument values and may have side effects.

A procedure is a function which returns no value but has only side-effects. The c language, for example, has no procedures, only functions. ansi c even defines a type, void, for the result of a function that has no result.

 
Thesaurus Terms
 
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