Function

Function (from the Latin functio, activity ',' performing ') stands for

The task of an object, see function (object)
Mission and purpose of a system, see Function ( system theory )
A mapping between quantities, see Function (mathematics)
A subroutine of a program, see function (programming)
The reactivity of organic compounds determining property of atomic groups, see Functional group
Doctrine of the benefits of nature into their recognizable structures ( individual beings, organs, cells, chemical metabolism ), see Physiology especially in ecosystems ecosystem function see