JavaScript - Let Keyword - W3Schools.com

Welcome back, coders! Lets look at the magical powers of the let keyword in JavaScript. It’s not just a better way to declare variables it’s a game-changer!

Let’s break it down Back in the day, JavaScript didn’t have block scope. Variables declared with var spilled everywhere, either into the global scope or function scope. But in ES6, let introduced block scope, which confines variables inside blocks like little fenced gardens for your code.

In this example, let x = 2 is declared inside a block. If you try to use x outside the block, JavaScript throws an error. It’s protected nice and secure!