//Collection of items countries = ["Bangladesh", "USA", "UK"] countries[0] countries[1] country = countries[0] country //Mutable countries[0] = "Poland" countries countries.length; countries[countries.length] = "Norway" //Push and Pop countries.push("China"); // return length countries.pop() // returns length countries.push("Japan", "Srilanka"); countries.shift() //returns the shifted countries.unshift("Germany") // returns length //Empty array var numbers; numbers = [] numbers.push(1) numbers.push(78) numbers.push("One") x = "Bangladesh" var y = x.split("") x = "Bangladesh is a country" y = x.split("") y = x.split("n") z = x.split(" ") x = "Bangladesh, China, Finland" y = x.split(",") z.toString() z.join("/") x.concat(z, y); countries.sort() countries.reverse() //Links //https://www.w3schools.com/jsref/jsref_obj_array.asp