What is the defrence between Var , const ,let in JavaScript ?

Question

Var,const,let

Answer 1

These have really good explanation

https://code.sololearn.com/WdGAFeNRAe9M/?ref=app
https://code.sololearn.com/WX4dAZq1IMBv/?ref=app

Answer 2

# var, let & const
• https://academind.com/learn/javascript/var-let-const/

While 'const' and 'let' variables are scoped by code blocks, functions or modules,
'var' variables are scoped only by functions or modules.

Check out this article about javascript scope variable — https://dmitripavlutin.com/javascript-scope/

Yacine Becha Please,
Try to use the search bar future as you can find many similar threads and to avoid from posting duplicate!

Answer 3

I'll say in three sentences :

var : To make a global variable

let : allows you to make local variable

const : used to make a constant (not a variable, which means you can't change once you declare it)

Example :

var name = 'something';

You can now access the name variable anywhere from the script.

const sayName = () => {
let name = 'something';
}

This name variable is just accesible inside the sayName function.

const name = 'something';
name = 'lol'; // name will not ever change, bcz it is supposed to be a constant.

Hope this helps :))

Answer 4

Thanks for helping