Function

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-oriented programming
 * Function (computer programming), a callable sequence of instructions

Music

 * Function (music), a relationship of a chord to a tonal centre
 * Function (musician) (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

 * Function (biology), the effect of an activity or process
 * Function (engineering), a specific action that a system can perform
 * Function (language), a way of achieving an aim using language
 * Function (mathematics), a relation that associates an input to a single output
 * Function (sociology), an activity's role in society
 * Functionality (chemistry), the presence of functional groups in a molecule
 * Party or function, a social event
 * Function Drinks, an American beverage company