Introduction to Functions
A function is a reusable block of code designed to perform a particular task. They allow you to DRY up your code (Don't Repeat Yourself).
Arrow Functions
Introduced in ES6 (2015), Arrow Functions provide a concise syntax for writing function expressions. They are wildly popular and form the backbone of modern frameworks like React.
Scope and Closures
Understanding Scope is the key to mastering JavaScript. It dictates the accessibility and visibility of variables across different parts of your code.