It is a declarative programming paradigm, which means programming is done with expressions. In functional code, the output value of a function depends only on the arguments that are input to the function, so calling a function f twice with the same value for an argument x will produce the same result f(x) each time.
The definition of a steward is an employee who is charge of the management of a very big house or a person who is responsible for the food and drink staff at a restaurant.The definition of a steward is an employee who distributes food and drinks. 1  An example of steward is the head butler in a mansion.
A warden is a person who has been entrusted with the oversight of something important to the community, such as a college, church, prison, wild game or firefighting.