Var vs Const vs Let (ES6) - Beau teaches JavaScript

Learn about the difference between const, var, and let in JavaScript ES6 (ECMAScript 6).

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[ylioo]

This is how you explain it, idk what's up with this 20 min vidoes, let vs var vs const

[abhinavkumar]

Best exact, to the point, explanation. Beautiful.

[_runic]

tl;dr
let - local variables that can be changed
var - global variables that can be changed
const - constant variables that cannot be changed

[pratikpokharel]

crisp and clear, covered everything needed less than 4mins.THANKS

[rayjaymor]

In less than 4 minutes you explained to me in an easily understandable manner what 30 minute videos and several pages of documentation couldn't get through my skull. Thank you!

[mikestuff]

Thank you for keeping it short and to the point.

[aceborja]

Thank you once again Beau for clarifying.

[antsanders]

Thank you for making this 80 times easier than Codeacademy lol

[Mikael]

Everything is clear to me now. Thanks for explaining the difference between const, let and var.

[theonewhodoesPoland]

Clear explanations, thanks for sharing!

[stevenshelby]

This guy makes you think you're watching this video at 1.5x speed

[mirataoskoi]

Guys what do you think I should do : keep learning JS or start working as a content manager for a company?

[batfan]

Does this mean we don't need to change or "increment" _i_ anymore? We can use _let_ in loops, and have all of them be _i = foo, _ _i < bar, _ _i++?_

[yanivsalman]

you can push to a const variable thats important (:

[moza]

ok the var and const is easy thing to remember when first learn, so the let key point is scoop right?

[aybakk]

let: block-lvl VARs - values can be changed
const: values never change
var: srsly u don need an explaination for dis:)

[sayantaniguha]

for(var i=1;i<=5;i++)
{
setTimeout(function(){ console.log(i) }, 1000);
}

Why does it give o/p *6* ?
It should give
1
2
3
4
5
...but it isnt, , whyy ??..
Plz give me an explanation related to hoisting

[trappedcat]

I just use var, closures, and caps to indicate constants. I'll use const and let in 5 years once I don't need to depend on a compiler to interpret them.

[hyunchae]

without explanation on hoisting, it is not clear why 'var' variable is already available even before it is defined.

[sandiladhikari]

And if you use for(i = 0; i < 3; i++) without assigning neither let nor var keyword, the i becomes global variable.