Javascript

Data Type In Javascript?

In This Article, We Learn what Data Type is in javascript😍 and How many data types are in javascript.

Let's Start it

DEMO:

What is data?

Any name, number, true, and value is data in javascript.

var name='Rajdeep Singh'; 
let number=677;
const boolen=true;

// name is variable name and Rajdeep Singh is data store in variable

How to store Data in Javascript?

In javascript, we store data using var, let, and const keywords.

var data='Rajdeep Singh'; 
let number=677;
const rendomData='xyz';

How Many Data Types In Javascript?

The ECMAScript language Provide two types of data type in javascript

Note:

Javascript is a Dynamic Type of Language. You don't need to specify the type of variable in javascript. because it is a dynamic declare by javascript engine

1. Primitive Data Type
2. Non-Primitive Data Type

Primitive Data Type:

Primitive Data Type in javascript is Undefined, Null, Boolean, String, Symbol, and Number

var name='Rageep Singh' //string type
let number=56;  // Number type
const=true;    // boolean type
let undefind; // undefind type
let Null = null; // null type
typeof Symbol('Rajdeep') // symbol type

Non-Primitive Data Type

Primitive Data Type in javascript is Object and Function

let Object={
  name:"Rajdeep",
  lastName:"Singh"
}// object type

let Array=[1,2,3,"rajdeep" ,'singh',5.7] // object type

let Regex=/regex here/gi  // object type

function(){} // function typE

How to Check Variable Type?

The typeof operator tells the Type of Variable

typeof {name:'John', age:34} // Returns "object"
typeof [1,2,3,4]             // Returns "object" not "array"
typeof null                  // Returns "object"  
typeof function myFunc(){}   // Returns "function"
typeof true // return boolean
typeof "Rajdeep Singh"   // return string
typeof '' // return string;
typeof 37        // return number';
typeof 3.14 // return number
typeof Symbol() // symbol type
typeof Symbol('Rajdeep') // symbol type

Demo

Read More On Medium

Reference

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof
• https://www.w3schools.com/js/js_datatypes.asp

Conclusion

Javascript is provided to us dynamic declares a variable by javascript engine (Chrome Brower, Firefox Brower ).

Suppose there are Any queries, mistakes, and Suggestions. Then, please, tell me in the comment box.

Contact me:

• https://www.officialrajdeepsingh.dev/
• [email protected]

Thanks for Reading