Can we leave the first element blank when declaring a constant using useState?

Question

Can we write

const [, setOpenCollapse] = React.useState(false);

? If I leave the first element blank when declaring a constant using useState in React, is this valid syntax?

Answer 1

Syntactically, this code is valid, it compiles. However, when written like this, you won't have a reference to the state and therefore won't be able to use it.
If you don't use state, there's no point in having it.