16.1: let vs var - Topics of JavaScript/ES6

Love your videos and explanations of topics so everyone can understand :)

Thank you!

var x = 0 do console.log(x) while(x>o)

You r just perfect!

Awesome, thank you! Best explanation for this that i've read/watched. Sidenote: when i was running the example where 100 was expected, i was getting undefined. I needed to run setup() after, so that part stumped me for a bit.

function setup() {
for (var i = 0; i < 100; i++);
}
console.log(i);
}
setup() // ;)

He is the Professor from money heist but IT professional. :D

Thanks so much for this. I had been wondering and had been meaning to find out at some point but your examples were superb to effectively demonstrate the difference. Amusingly I'd never realised that "for (int i = etc" in C++ only had i in scope inside the loop. I mean it makes sense but I was never consciously aware of it. I guess I rarely tried to re-use the counter outside of the loop, or if I did, I guess I must have fixed it on auto-pilot without really thinking about it properly.

i came here for the let,
but i stayed for the jokes xD

This was one of the most entartaining video that I watched on `let` and `var` pretty fun, thank you :)

When I'm down I watch Coding train videos and the sun shines again :) Thanks for being such an awesome human being and teacher!

I almost always use let and never use var.

"let" is a keyword frequently seen in functional programming languages, which JS is slowly inching closer to becoming at least a language that allows for fully functional code.

This video was fantastic.

Shouldnt the error be "i is not initialized"? Saying it is "not defined" is wrong because something not being defined doesnt throw an error. If you do "let i; console.log(i)", it doesnt throw an error even though it is not defined.

I need some help on node loop

want to print n elements from the array after 10 seconds till complete array in a node so which is a better way

ex:
array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

print:
1
2
sleep 10 sec
3
4
sleep 10 sec
.
.
9
10

in this way

Human body? Do you even lift, bro?

let was likely used because it's often used as a keyword in functional programming keywords for a long time. It's also used in mathematics to assign values to algebraic values. In terms of linguistics, you're asking the compiler to "please LET x equal [value]".

"2015... which is quite a while ago at this point [in 2017]" me watching in 2022... 👁👄👁

Thank you bearded angel in human skin!!

whenever i saw you, i laugh lol <3

wow

This is actually very informative AND entertaining/funny. That is unique, not many have this talent. Makes learning much easier for people like me! Thanks!

very informative

expertly explained.

best teacher no cap

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

If we manage to invent full-fledged robots but we're still stuck with JavaScript we'll know that our civilization has FAILED, lol

Let allow or acess only in block
Var allow or acess in entire function it belongs

kg vs lb

too much drama.

you should delete the part you said wrong, now i will confuse var and let rest of my life

I have always used let, but I didn't know why until now :)

What's your age, Sir?

I'm 17.
It helped me a loooooot.

I am a beginner. I know java But not script can you make it more basic. please

You look such a fun person but I don't understand a thing. I wonder if there is any tutorial that teaches not another tech dudes but rather real beginners.

get to the poiiiiinnnnntttttttttttttttttt

so the short version of this is: always use let ?

programmer in 2021: Oh this is useful
programmer since 2015: who makes videos on this topic 😑

He is the one of the best presenter i have seen in my life.

Now let also supports hoisting

So finally I understand the difference between let and var

Your behind my scene 😍

let: Look at me I'm the var now :>>

what I like about your videos is I don't feel like I'm studying at, all pretty cool .. sometimes I just play them in the background and sleep (this mean they reach the level of comfort to me which not so many can do)
but what I dislike about you is you're always putting yourself down and not believing in what you already have which's annoying

just a flying opinion :)

Great work, you are the best: keep It on!

Does hoisting happen in case of let also? Or any similar transpiling on let keyword before the interpreter can actually work on the instructions?

ya allah plz forgive me stop watching this.

JavaScript was conceived as a shit language. The creator even used the word Java because Java was popular back then. Smh. I wish there was a better language for web scripting. Fml