Section 12 Chapter 69 - Functional Programming

A style of computer programming e.g. OOP

Series of instructions that tell the computer what to do

Written statements are implemented in a way that the programming language deems most appropriate

Functions are the building blocks of the program. Statements are written as a series of functions

A rule or set of rules that maps values from the domain to the co-domain. A value from the domain is input tot the function and it returns a value from the co-domain

They are both subsets of objects in some data type

The set from which the functions input values are chosen

The set from which the functions outputs are chosen. Not all the members of the co-domain need to be outputs

yessir

A -> B, where A is the argument type and B is the result type

The data type of an argument of a function

The data type of the output of a function

An object which can • Appear in expressions • Be assigned to a variable • Be assigned as an argument • Be returned by a function

functions!!1!!11 :O

They can be passed as an argument or returned by a function

A function applied to its arguments

• Statelessness - No side effects

Variables are immutable - their value cannot change

The only thing that a function can do is calculate something and return a result. Since the value of variables cannot change a function will always return the same output for the same input

Since functions can be used as an argument, multiple functions can be combined to create a new function

A set of values e.g. Integer, Float

A set of types e.g. Num, which contains Integer, Float…