Basics of Data types in Javascript

Introduction to Variables and Data Types in JavaScript

If you’re new to JavaScript, one of the first concepts you’ll need to learn is variables and data types. Variables act like containers that store values, while data types define the type of data that can be stored in a variable. In this blog post, we’ll provide an overview of variables and data types in JavaScript.

Variables in JavaScript A variable is a named storage location that holds a value. In JavaScript, you can create a variable using the var, let, or const keyword. For example, you can create a variable called name and assign it a value like this:

let name = "John";

In this example, let is the keyword used to declare the variable, name is the name of the variable, and "John" is the value that is assigned to it. Once you've created a variable, you can use it throughout your code to store and retrieve values.

Data Types in JavaScript JavaScript supports several data types, including:

Primitive data types are immutable meaning not able to be changed and these are the primitive types in JavaScript:

• String: a sequence of characters enclosed in quotation marks
• Number: a numeric value, such as 10 or 3.14
• Boolean: a value that is either true or false
• Undefined: a variable that has been declared but has not been assigned a value
• Null: a variable that has been explicitly assigned the value null
• Symbol: a new data type introduced in ECMAScript 6, used to create unique identifiers.

Non-primitive type is just opposite of a primitive type meaning it can be changed and there’s only one non-primitive type:

• Object: a complex data type that can store multiple values and properties

Here are a few examples of how you can declare variables with different data types:

 let name = "John"; // string
 let age = 30; // number
 let isMale = true; // boolean
 let job; // undefined
 let car = null; // null
 let id = Symbol("id"); // symbol


 let person = { name: "John", age: 30 }; // object

Conclusion :This post covers the basics of variables and data types in JavaScript. Mastering these concepts is essential to writing effective JavaScript code.

See you guys next time!