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function [n]

1)	a mathematical relation such that each element of one set is associated with at least one element of another set

Synonyms :

mathematical_function

2)	what something is used for; "the function of an auger is to bore holes"; "ballet is beautiful but what use is it?"

Synonyms :

purpose role use

3)	the actions and activities assigned to or required or expected of a person or group; "the function of a teacher"; "the government must do its part"; "play its role"

Synonyms :

office part role

See Also:

duty officiate capacity hat portfolio lieu second_fiddle

4)	a relation such that one thing is dependent on another; "height is a function of age"; "price is a function of supply and demand"

Synonyms :

See Also:

relation

5)	a formal or official social gathering or ceremony; "it was a black-tie function"

Synonyms :

See Also:

social_affair

6)	a vaguely specified social event; "the party was quite an affair"; "an occasion arranged to honor the president"; "a seemingly endless round of social functions"

Synonyms :

affair occasion social_function social_occasion

See Also:

social_event party celebration ceremonial fundraiser photo_op sleepover

7)	a set sequence of steps, part of larger computer program

Synonyms :

procedure routine subprogram subroutine

function [v]

1)	perform as expected when applied; "The washing machine won't go unless it's plugged in"; "Does this old car still run well?"; "This old radio doesn't work anymore"

Synonyms :

go operate run work

See Also:

run functioning operation malfunction double roll cut work serve

2)	serve a purpose, role, or function; "The tree stump serves as a table"; "The female students served as a control group"; "This table would serve very well"; "His freedom served him well"; "The table functions as a desk"

Synonyms :

serve

See Also:

serve answer prelude act_as

3)	perform duties attached to a particular office or place or function; "His wife officiated as his private secretary"

Synonyms :

officiate

See Also:

serve functionary officiation officiating office berth office

From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)

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.

(1996-09-01)

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