Variable in JavaScript

The analogy 📦

Think of a variable in JavaScript as a labeled box 📦 where you can store a value. Just like how you would label a box with a name to keep track of what is inside, you give a variable a name to store a value.

A variable is simply a way to store a value in your code. To create a variable in JavaScript, use the const / let / var keyword followed by the name of the variable and assign it a value using the equal sign.

For example, you could create a variable called "name" and give it the value "John Smith". You can then use that variable in your code to refer to that value.

const name = "John Smith";
console.log(name); // John Smith

var, let and const

JavaScript has three types of variables: var and let and const. The var keyword is used for variables that are function scoped, meaning that their scope is limited to the function in which they are defined. On the other hand, let and const are block scoped, meaning that their scope is limited to the block in which they are defined.

Note: The best practice in JavaScript is to use const by default, and only use let when you need to reassign the variable. var should be avoided as much as possible.