Functions

Functions are reusable blocks of code. You define them once, and can "call" them many times with different inputs.

Function Declarations

A basic function takes inputs (parameters), does something, and returns an output.

Try It Yourself

Introduced in ES6, arrow functions provide a shorter syntax and are commonly used for passing functions as arguments.

Try It Yourself

Challenge 1: Write a function isEven that takes a number and returns true if it's even, false otherwise.