In this blog we will see different data types in JavaScript. So, first thing first, what is a data type? Data type refers to type of value. Let's see them with examples.

var, const is a keyword to declare variable

=(equal) assigns value on right side to left side

Number-

This data type stores any kind of numbers like without decimals and with decimals. Ex:

var num = 42; // number without decimal

var price = 25.25; // number with decimal

Strings-

This data type stores strings wrapped inside quotes( ' ' ," "). Ex:

var name = 'Riazo'; // string with single quote(')

var text = "Hello there!"; // string with double quotes(")

Boolean-

This data type can have only two values true or false. Ex:

var isActive = true; // boolean value true

var isPresent = false; // boolean value false

Additional read

Advanced data types

• Null- In simple terms, it means value does not exist. Ex:

var nullType = null; // null is a keyword

• Undefined- It usually occurs when value is not yet assigned. Ex:

var undefinedType = undefined; // undefined is a keyword

var undefinedType; // with undefined variable, output is similar as above

• BigInt- It stores any longest/ largest number which cannot be hold by Number type. Ex:

var bigIntType = 9848484844848484n; // 9848484844848484n

• Symbol- A Symbol is a unique and immutable type that may be used as key. Ex:

var symbolType = Symbol("symbol"); // undefined value on console

For more detailed and advanced data types you can check mdn docs.

Hope you learned and enjoyed reading :)