Svelte Writable Stores n+1 vs n++

Working through the official svelte example of writable-stores https://learn.svelte.dev/tutorial/writable-stores

Wondering why this works in updating count

    function increment() {
        count.update((n) => n+1);
    }

and this does not?

    function increment() {
        count.update((n) => n++);
    }

>Solution :

n++ is a post-increment operator. It returns the current value, then increments the variable. In this case, you want to use the pre-increment operator, which looks like ++n. It first increments the value, then returns the already incremented value.

function increment() {
    count.update((n) => ++n);
}

Javascript increment operator