Functional Programming

Question 1

What is a Function?

Answer 1

A function is a subroutine that carries out a set of instructions and returns a value.

Question 2

What is Functional Programming?

Answer 2

Functional programming is a paradigm based on the use of functions to determine variables, where functions use expressions similar to mathematical expressions to calculate the value of a variable.

Question 3

What is immutable?

Answer 3

that the function only changes the state or value of input data at the time the function is executed

Question 4

What are side effects?

Answer 4

in procedural languages that are mutable and have the side effect that changing the state of a variable may impact on how the program is executed. Functional programs are immutable so do not suffer from this side effect.

Question 5

What is statelessness?

Answer 5

Statelessness, which means each function is calculated with no reliance on any data other than which was passed as function inputs; there is no dependence upon events that happened previously in a program’s execution.

Question 6

What are high order functions?

Answer 6

Higher-order functions are functions that either take other functions as an input (or argument) or return a function as an output.