Mastering Variables & Data Types in JavaScript

In the world of JavaScript, variables and data types play a fundamental role in defining how information is stored and manipulated within a program. Let's delve into the key concepts that every developer should master. Variables in JavaScript Variables are used to store data values. In JavaScript, you can declare a variable using the let , const , or var keywords. For example: let age = 30 ; const name = ' Alice ' ; var isAdmin = false ; Primitive Data Types JavaScript has six primitive data types: string , number , boolean , null , undefined , and symbol . Each type serves a specific purpose in storing simple data values. Complex Data Types Apart from primitive types, JavaScript also has complex data types like object and array . Objects are collections of key-value pairs, while arrays are ordered lists of values. Here's an example: const person = { name : ' Bob ' , age : 25 }; const numbers = [ 1 , 2 , 3 , 4 , 5 ]; Type Coercion JavaScript is a dynamically typed language, which means