I am having trouble comprehending this JavaScript code, could someone provide me with assistance?

Currently delving into the world of JavaScript functions and stumbled upon this code snippet with the following output:

Output: "buy 3 bottles of milk" "Hello master, here is your 0 change"

function getMilk(money, costPerBottle) {
    console.log("buy " + calcBottles(money, costPerBottle) + " bottles of milk");
    return calcChange(money, costPerBottle);
}
function calcBottles(startingMoney, costPerBottle) {
    var numberOfBottles = Math.floor(startingMoney / costPerBottle);
    return numberOfBottles;
}
function calcChange(startingAmount, costPerBottle) {
    var change = startingAmount % costPerBottle;
    return change;
}
console.log("Hello master, here is your " + getMilk(6, 2) + " change");

Struggling to grasp the significance of "startingMoney" and "startingAmount" in this context. Plus, curious about how it calculates the number of bottles.

Answer №1

Within this scenario, there exist three specific functions in play. Initially, we encounter the function getMilk that is initially defined but only executed through its call within a console.log parameter evaluation.

Therefore, prior to any other actions being performed by the program, it begins by executing getMilk, leading to the output of the string

"buy 3 bottles of milk"
on the console. The value of 3 holds significance as it is determined by invoking the calcBottles function, which calculates the quantity of bottles that can be bought with the total amount of money at hand.

Subsequently, the program proceeds by calling the calcChange function, resulting in the remainder of the total money and price per bottle. In this instance, the remainder is calculated to be 0, and upon returning to the original caller, generates the message

"Hello master, here is your 0 change"
.

Answer №2

To determine the number of bottles needed, you input the available funds and the cost per bottle into the equation. The total money is then divided by the individual bottle price to calculate the quantity that can be purchased. Utilizing Math.floor ensures the final count is rounded down to the nearest whole number.

Answer №3

The values of startingMoney and startingAmount determine the overall capital on hand and the quantity of bottles is determined by dividing the total capital by the price per bottle.

Answer №4

They are synonymous. It pertains to the funds passed into the getMilk function.

Given the total amount of money and the cost per bottle, you can determine:

The number of bottles that can be purchased with the total amount of money (calcBottles function)

And the remaining change if the total amount of money cannot evenly cover the cost of a bottle (calcChange function)

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