01-Tuple.js

var mybook1 = ["HTML & CSS", 450];
var mybook2 = ["JavaScript", 420];
var mybook3 = ["SQL", 340];
var mybook4 = ["NoSQL", 380];
console.log("Betik 1 : " + mybook1[0] + " " + mybook1[1]);
var mybooks = [mybook1, mybook2, mybook3, mybook4];
console.log("Betik 1 : " + mybooks[0][0] + " " + mybooks[0][1]);
console.log("Betikler");
for (var i = 0; i < mybooks.length; i++) {
    console.log("\t" + mybooks[i][0] + " : " + mybooks[i][1]);
}