In today’s tutorial, we’re going to learn how to declare, interact, and scope variables in JavaScript. We’ll introduce new concepts and important JavaScript keywords like var, let and const.

As with almost every programming language, JavaScript treats various types of values differently. A string like “Hello world” is very different from a number like 42. But what types are available, and ...

Another new feature called ‘let’ offers a new way of defining variables in JavaScript. You’re probably used to defining them with ‘var’ but the difference is subtle: scope.