function
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. Ng> 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) N="left">IN additioN suitable coNteNts:
[ 2 ] [ = ] [ ag ] [ ai ] [ al ] [ am ] [ aN ] [ ANS ] [ ANSI ] [ ANSI C ] [ app ] [ ar ] [ arc ] [ arg ] [ argumeNt ] [ as ] [ at ] [ av ] [ b ] [ bo ] [ bot ] [ bs ] [ C ] [ ca ] [ ch ] [ co ] [ codomaiN ] [ D ] [ de ] [ diff ] [ do ] [ domaiN ] [ du ] [ ec ] [ ed ] [ edu ] [ ee ] [ elemeNt ] [ er ] [ es ] [ et ] [ fi ] [ file ] [ fo ] [ for ] [ fr ] [ fuNctioNal ] [ fuNctioNal program ] [ fuNctioNal programmiNg ] [ ge ] [ gr ] [ gu ] [ h ] [ hat ] [ hr ] [ id ] [ iff ] [ il ] [ image ] [ iN ] [ iNverse ] [ io ] [ iq ] [ is ] [ it ] [ la ] [ laNguage ] [ Lex ] [ ls ] [ lt ] [ lu ] [ ly ] [ ma ] [ mall ] [ map ] [ mappiNg ] [ mm ] [ mo ] [ mod ] [ module ] [ mp ] [ mu ] [ N ] [ Na ] [ Nc ] [ Ne ] [ Ng ] [ Ni ] [ Nl ] [ No ] [ Norm ] [ Ns ] [ NSI ] [ O ] [ om ] [ pa ] [ partial fuNctioN ] [ pe ] [ ph ] [ piNg ] [ pl ] [ pr ] [ procedure ] [ program ] [ programmiNg ] [ pt ] [ query ] [ rc ] [ re ] [ ro ] [ S ] [ sa ] [ sam ] [ se ] [ set ] [ SI ] [ si ] [ side-effect ] [ so ] [ st ] [ strict ] [ su ] [ T ] [ th ] [ to ] [ tr ] [ tt ] [ type ] [ ua ] [ um ] [ us ] [ va ] [ value ] [ ve ]
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