Functional may refer to: * Movements in architecture: **

Functionalism (architecture) In architecture, functionalism is the principle that buildings should be designed based solely on their purpose and function. An international functionalist architecture movement emerged in the wake of World War I, as part of the wave of Modernis ...

** Form follows function *

Functional group In organic chemistry, a functional group is any substituent or moiety (chemistry), moiety in a molecule that causes the molecule's characteristic chemical reactions. The same functional group will undergo the same or similar chemical reactions r ...

, combination of atoms within molecules * Medical conditions without currently visible organic basis: ** Functional symptom ** Functional disorder * Functional classification for roads * Functional organization *

Functional training Functional training is a classification of exercise which involves training the body for the activities performed in Everyday life, daily life. Functional Strength Training Functional Strength Training is a fitness approach designed to enhance t ...

In mathematics

Functional (mathematics) In mathematics, a functional is a certain type of function. The exact definition of the term varies depending on the subfield (and sometimes even the author). * In linear algebra, it is synonymous with a linear form, which is a linear ma ...

, a term applied to certain scalar-valued functions in mathematics and computer science ** Minnesota functionals **

Functional analysis Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (for example, Inner product space#Definition, inner product, Norm (mathematics ...

, a branch of mathematical analysis **

Linear functional In mathematics, a linear form (also known as a linear functional, a one-form, or a covector) is a linear mapIn some texts the roles are reversed and vectors are defined as linear maps from covectors to scalars from a vector space to its field of ...

, a type of functional often simply called a functional in the context of functional analysis *

Higher-order function In mathematics and computer science, a higher-order function (HOF) is a function that does at least one of the following: * takes one or more functions as arguments (i.e. a procedural parameter, which is a parameter of a procedure that is itself ...

, also called a functional, a function that takes other functions as arguments

In computer science, software engineering

* "Functional" (noun) may be used as a synonym for

* (C++), a header file in the C++ Standard Library * Functional design, a paradigm used to simplify the design of hardware and software devices *

Functional model In systems engineering, software engineering, and computer science, a function model or functional model is a structured representation of the Function (engineering), functions (Activity diagram, activities, Task analysis, actions, wikt:process, pr ...

, a structured representation of functions, activities or processes in systems and software engineering *

Functional programming In computer science, functional programming is a programming paradigm where programs are constructed by Function application, applying and Function composition (computer science), composing Function (computer science), functions. It is a declarat ...

, a programming paradigm based on mathematical functions rather than changes in variable states * In an

ontology (information science) In information science, an ontology encompasses a representation, formal naming, and definitions of the categories, properties, and relations between the concepts, data, or entities that pertain to one, many, or all domains of discourse. More ...

, "functional" is a property or relation that can only hold a single value for a given individual

In mathematics

In computer science, software engineering

See also