- The definition of function is the normal action of something or how something works.
An example of function is how a bike is pedaled forward.
- Function is defined as an assigned duty or position within a company.
An example of function is a mail room attendant.
- Function means a formal event or ceremony.
An example of function is a company Christmas party.
The function of this pedal is to move the bike forward.
function definition by Webster's New World
- the normal or characteristic action of anything; esp., any of the natural, specialized actions of a system, organ, or part of an animal or plant: the procreative function
- a special duty or performance required in the course of work or activity: the function of an auditor, the function of the brakes
- occupation or employment
- a formal ceremony or elaborate social occasion
- a thing that depends on and varies with something else
- an action which is part of a series leading to a resulting action
- an operational instruction for programming an electronic device, as a digital watch, computer, etc.; also, an operation performed by such a device as a result of such an instruction
- any of the roles that a linguistic form can fulfill in an utterance
- Math. an association between two sets in which each element of one set has one assigned element in the other set: any selected element becomes the independent variable and its associated element is the dependent variable: y = f(x) means y is a function of x
Origin: Old French ; from Classical Latin functio ; from past participle of fungi, to perform ; from Indo-European base an unverified form bheug-, to enjoy from source Sanskrit bhuṅktē, (he) enjoys
- to act in a required or expected manner; work
- to have a function; serve or be used (as)
- functionless adjective
function definition by American Heritage Dictionary
- The action for which a person or thing is particularly fitted or employed.
- a. Assigned duty or activity.b. A specific occupation or role: in my function as chief editor.
- An official ceremony or a formal social occasion.
- Something closely related to another thing and dependent on it for its existence, value, or significance: Growth is a function of nutrition.
- Abbr. f Mathematics a. A variable so related to another that for each value assumed by one there is a value determined for the other.b. A rule of correspondence between two sets such that there is a unique element in the second set assigned to each element in the first set.
- Biology The physiological activity of an organ or body part.
- Chemistry The characteristic behavior of a chemical compound, resulting from the presence of a specific functional group.
- Computer Science A procedure within an application.
Origin: Latin fūnctiō, fūnctiōn-, performance, execution, from fūnctus, past participle of fungī, to perform, execute.
- funcˈtion·less adjective
function - Computer Definition
In programming, a self-contained software routine that performs a task. Functions can do a large amount of processing or as little as adding two numbers and deriving a result. Values are passed to the function, and values may be returned. Or, the function may just perform the operation and not return a resulting value. The concept of a function within a program is that, once written, it can be used over and over again without the programmer having to duplicate the same lines of code in the program each time that same processing is desired. Standard and Programmer-Defined Programming languages provide a set of standard functions as well as allow programmers to define their own functions. For example, the C and C++ programming languages are built entirely of functions and always contain a "main" function. The Application Programming Interface (API) Functions in one program can also be called for by other programs and shared. For example, operating systems can contain more than a thousand functions to display data, print, read and write disks and perform myriad tasks. Programmers write their applications to interact with the OS using these functions. This list of functions is called the "application programming interface" (API). Function Calls Functions are activated by placing a "function call" statement in the program. The function call often includes values (parameters) that are passed to the function. When called, the function performs the operation and returns control to the instruction following the call. The function may return a value or not. Writing a program in a language such as C/C++ involves calling language functions, one's own functions and operating system functions (APIs). There is a whole lot of function calling. See function prototype, API and interface. A Function Call Example: Open and Read The example below shows two very simplified API functions to open and read a file. The OPEN function is called to read the file "budget.txt," and the function returns a value in the variable HANDLE. If the file was opened successfully, HANDLE might contain a positive number, but if not, a negative one. The value in HANDLE is then passed to the READ function to read so many bytes (LENGTH) of the file into a memory area called INPUTBUFFER. The OPEN function returns the number of bytes read in the SIZE variable. handle = open("budget.txt"); size = read(handle, InputBuffer, length);
function - Cultural Definition
In mathematics, a quantity whose value is determined by the value of some other quantity. For example, “The yield of this field is a function of the amount of fertilizer applied” means that a given amount of fertilizer will yield an amount of whatever crop is growing.
function - Medical Definition
- The physiological property or the special action of an organ or body part.
- Something closely related to another thing and dependent on it for its existence, value, or significance, such as growth resulting from nutrition.
- A mathematical variable so related to another that for each value assumed by one there is a value determined for the other.
- A rule of correspondence between two sets such that there is a unique element in the second set assigned to each element in the first set.
- The general properties of a substance, depending on its chemical character and relation to other substances, that provide the basis upon which it may be grouped as among acids or bases.
- A particular reactive grouping in a molecule.
function - Science Definition
- A relationship between two sets that matches each member of the first set with a unique member of the second set. Functions are often expressed as an equation, such as y = x + 5, meaning that y is a function of x such that for any value of x, the value of y will be 5 greater than x.
- A quantity whose value depends on the value given to one or more related quantities. For example, the area of a square is a function of the length of its sides.