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Functional may refer to:

In mathematics[edit]

In computer science, software engineering[edit]

  • functional (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, a structured representation of functions, activities or processes in systems and software engineering
  • Functional programming, a programming paradigm based on mathematical functions rather than changes in variable states
  • In an ontology (information science), "functional" is a property or relation that can only hold a single value for a given individual

See also[edit]