Variables and Data Types
Explore how to declare and use variables in JavaScript with var let and const keywords. Understand the characteristics of primitive data types such as number, string, boolean, undefined, null, and symbol. This lesson helps you build a foundation for managing and manipulating data effectively in JavaScript.
Variables and data types are foundational to programming in JavaScript. Variables allow us to store and manipulate data, while data types define the nature of the data we can work with, such as numbers, strings, and booleans. In this lesson, we will explore how to declare variables in JavaScript using different keywords and understand the characteristics of various primitive data types.
Variables in JavaScript
In JavaScript, variables store data values. We declare them using var, let, or const.
The var keyword
var is function-scoped and can be redeclared or updated, which may ...