ex04.1_array.js

let days = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
console.log(days[0]); // -> Sun
console.log(days[2]); // -> Tue
console.log(days[5]); // -> Fri

days[0] = "Sunday";
console.log(days[0]); // -> Sunday

let emptyArray = [];
console.log(emptyArray[0]); // -> undefined