Are Const and lets no longer needed in JavaScript 🤔🤔😕😕??

Question

Now look at this code
https://code.sololearn.com/WrPe4P8H9s91/?ref=app
I tried it on browser as well and it worked fine🙁...
But why?? 👀
And is this the end of using 'const's and 'let's 😐 just like python🤔??
What you guys think of it?? 🤔🙃

Answer 1

Not the case, it seems you misunderstood it.
If you don't use declaration keywords then it will make that variable global scoped variable(not recommended at all)
https://code.sololearn.com/WWFa8Sti92Sn/?ref=app

Answer 2

Steve Sajeev thanks for suggestion
I added the open ended tag ( I've seen mods doing so😅😅)

Answer 3

Var let and const are used to define variables. What you are using are undefined variables. The problem with that is if you make a typo, there will be a whole new variable in the code to deal with...
https://code.sololearn.com/WfIjWr5gEzOQ/?ref=app

Answer 4

Ok Raj Chhatrala , sorry...

Answer 5

Java script has so much options so much possibilities that's why I love it😃
I declare a variable like this most of the time👇
name="atomic wave"