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 man employed in a large family, or on a large estate, to manage the domestic concerns, supervise other servants, collect the rents or income, keep accounts, and the like. Worthy to be stewards of rent and land. They came near to the steward of Joseph's house.