Things you did not know about hoisting in Javascript!

So you think you know javascript, right?

What do you think would be the output of this code snippet?

it's 2

Stumped yet?

What about this question? What do you think is the output this time?

its undefined

Confused? Well, let us clear that confusion. Here's a short video that I created concisely explaining the concept:
https://www.youtube.com/watch?v=ncq_PE3T0WI&t=18s