Javascript : Loop Part 2- Array

Variable boleh simpan number dan string, namun kita hanya boleh store 1 number atau satu string sahaja.
Mujurlah kita punyai array. Apa guna array?

a. store lists of data
b. can store different data types at the same time
c. are ordered so the position of each piece of data is fixed

var names = ["Mao","Gandhi","Mandela"];

var sizes = [4, 6, 3, 2, 1, 9];

var mixed = [34, "candy", "blue", 11];

Bila mana anda lihat  data dilingkungi dgn tanda [ ], it is an array.

Contoh:

var profile = ["Nik","IT Manager",32,4];
console.log(profile);

1. First element in the array: profile[0]



2. Third element in the array: profile[2]

atau jika ingin mendapatkan data 32, maka gunakan profile[2]

console.log(profile[2]);

Kalau ada 4 elemen dalam array, ok la. Bagaimana dengan 100 elemen dalam Array? Kita akan gunakan Array.

// Let's print out every element of an array using a for loop

var cities = [ "Pulai Chondong", "Melbourne", "Amman", "Helsinki", "NYC", "Kota Bharu"];

for (var i = 0; i < cities.length; i++) {
    console.log("I would like to visit " + cities[i]);
}

I would like to visit Melbourne I would like to visit Amman I would like to visit Helsinki I would like to visit NYC

Keyword, ianya berhenti sebelum cities.length