JavaScript Let vs Var vs Constant | Mosh

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1) "var" is function-scoped, whereas "let" is block-scoped.
2) Using "var" attaches the variable to the window, whereas "let" prevents it.

sanket_sy

Mosh is the best teacher, calm and friendly voice, perfect speed and flow of speach. There are only a few software teacher, who increases my mood when following the tutorials and he is one of them!

m.u.

Finally, I understood the difference between var and let. Great video.

flyingbirds

I came here to learn about const. I left without that knowledge.

memaimu

I was searching everywhere to understand the difference and finally found this video. Really helpful! Thanks for making this video. :D

pranjalijambhule

Short and to the point explanation! Thank you very much! I'm learning JS right now 😁

codinginflow

The best explanation of let and var keyword so far, Thanks

hardik.motwani

Thank you so much, that was crystal clear.

ga

What a wonderful way to explain. loved it.

kicn

Packed with information, but short and concise. great video

blub

first time watching your video, great explanation! Thank you for your help!

kevinpatel

Thanks for this video. Finally understood the difference between var and let

Shiva-zyjq

CONST is a 'variable' that cannot be changed. It is a CONSTant. This is useful as a control so that you don't inadvertently make a change to a variable. You can define all your variables as CONST and change them as needed if you find you do need to update them.

frankvee

Great content loko. I subscribed by the 3rd video.

tochachochi

The best explanation ever! Thank you very much!

evans_

Finally I understood the differance thanks Mosh !

maulikgevariya

This video was well done. Mosh, you tha man

jerryrobinson

Mosh jan, you should add WHY bloating the "window" let say or other objects with variables and functions is bad. watching your video, a novice would think, "well, why would having access to data outside of a scope bad?!", which is a valid and good question. Otherwise, a very nice video, thanks :)

RezaMohseni

Great video, thank you. So if I declare a variable using let in the global scope, does that have the same scope as the window object?

mikepalazzo

A great and simple explanation of var vs. let. Thank you Mosh.

samithakulatilaka

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