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JavaScript

Laura Perea
Laura Perea
7,630 Points
Posted by Laura Perea
Laura Perea
7,630 Points

Why use let instead of var?

I was trying to be a step ahead when watching this video – I chose to use var when setting the variable for message (to fix the error with const). Ultimately though, Guil chose let. They both work in this example with no risks that I can see. What would be better practice here? Any reason why let would generally be a wiser choice?

1 Answer

Conor Vanoystaeyen
Conor Vanoystaeyen
16,687 Points
Conor Vanoystaeyen
Conor Vanoystaeyen
16,687 Points

The main difference is the scope difference, while let can be only available inside the scope it's declared, like in for loop, var can be accessed outside the loop for example.

Var is also obsolete and is no longer used. You can assume that let and const are the only things you will be using.

Here is more about this topic → https://stackoverflow.com/questions/762011/whats-the-difference-between-using-let-and-var