Как работает данный код?

var products = ["Choo Choo Chocolate",
    "Icy Mint", "Cake Batter",
    "Bubblegum"
];
var hasBubbleGum = [false,
    false,
    false,
    true
];
var i = 0;
while (i < hasBubbleGum.length) {
    if (hasBubbleGum[i]) {
        console.log(products[i] + " contains bubble gum");
    }
    i = i + 1;
}