{
    function lol() {
        console.log("LOL");
    }
}

lol();  // possible, same as [var lol = function..]


{
    let kek = function() {
        console.log("KEK");
    }
    kek();  // works
}

kek();  // error, as expected


{
    let function rofl() {  // syntax error..
        console.log("ROFL");
    }
}