JavaScript how to properly declare a variable ( Local vs Global, block scope , constants )

JavaScript Pattern: How to properly define variables in javaScript. Considering Global vs Local, const, block scope.

- Advance javascript tutorials on object oriented programming
- How to define a global variable
- How to define a local variable
- how the block scope work in javascript
- How to define a constant in javascript

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[jptalks]

Great, very clear! Really appreciate the way you explain lexical and block scoping with var/let by demonstrating their respective properties.

[akifansari]

I think you(sir) provide the best knowledge of Java script. Best channel ever my life to learn JavaScript. Thank you sir

[alikhan]

The most under rated tutor. Great bro.

[dhruvshahiofficial]

U have really explained 3 concepts in 5 min. and that also awesomely. I always see ur javascript videos just bcoz u explain things beautifully. Don't stop adding new deep learning videos related to JS. Yeah you really dive deep n that's the only reason why i am here. Aplauds.

[charllabuschagne]

Thank you for the video. Well explained with straight forward easy to understand examples!

[robinkartik]

Great explanation in just five minutes. I am going to subscribe this channel right now.

[juliakhvan]

Amazing explanation. We want more videos!

[JumpNationFilms]

Good video, concise and to the point!

[milossavkovic]

This is the best explanation i have ever watched.. Thank you so much <3

[craigbourne]

Great explanation. I'm doing a Udacity nanodegree and they keep referring to 'the block' without really explaining it. Looking it up on MDN didn't demystify it, but your video did the trick. Thank you.

[noemitotos]

amazing videos, well explained, I'm getting hooked! Thank you

[psalmy]

Nice editing, I can see you're improving! Your closure and object creation methods really helped me grasp the concepts, so I'm excited to see you get even better.

[vincent]

"Woah...." I had no idea var defined the variable locally inside the specific function and expressions without a binding like var are global.

[govindjha]

Hi, Nice tutorial I ever seen. I have very much curiosity to learn new things in JavaScript. I liked your all video about JavaScript. Thanks.
Govind...

[chen_eason]

hi, your tutorial is really good.Hope you can post some tutorial like javascript es6 or reactjs

[chen_eason]

One thing to remerber is that when an inner function define a variable with var,
it will not chage the the outside variable.
(if) block within function is not like (function) within function

[hgyala]

I do follow you to learn JavaScript. That is what I can comment over here. Thx

[cookiecutter]

So there's a difference between 'block' and 'scope'? even though they both use curly brackets?

[artihlec]

Since a const variable is implemented, do developers still write it in a capital-case fashion? const SOMETHING = 'stuff';

[igorcweb]

Can someone please explain what does if(true) mean? What exactly does the boolean refer to? Thanks in advance!