It's really recommended to declare var keyword? If I don't, it can affect the readability of the code?

Question

var javaScript = 10

javaScript = 10

Answer 1

Always declare with var because without it you effectively declaring a global var (though you have declared it inside a function) and that can have some hard to detect problems

Answer 2

https://code.sololearn.com/W3yNj6FNnLRF/?ref=app