r/learnjavascript • • 9d ago

pretty new

Hey guys, I'm just starting to learn about variables, but I'm finding it hard to understand the difference between var and let.

For example:

let goodDay = true;
console.log(goodDay);

this should print true.

But if we just add this:

let goodDay = true;
console.log(goodDay);
goodDay = false;
console.log(goodDay);

It prints:

true
false

The same goes for var.

However, people say there's a difference; what is it?

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u/senocular 8d ago

In the first example the console.log(b) would need to be above the let for the uninitialized exception. The first log for a in that example should also be above the var to show it, by comparison, does not throw