notHoisted(); // TypeError: notHoisted is not a function

var notHoisted = function () {
  console.log("bar");
};

var math = {
  factorial: function factorial(n) {
    if (n <= 1) return 1;
    return n * factorial(n - 1);
  },
};

var foo = function () {};
foo.name; // "foo"

var foo2 = foo;
foo2.name; // "foo"

var bar = function baz() {};
bar.name; // "baz"

console.log(foo === foo2); //true
console.log(typeof baz); // undefined
console.log(bar === baz); // false (errors because baz == undefined)

var x = function (y) {
  return y * y;
};

button.addEventListener("click", function (event) {
  console.log("button is clicked!");
});