I am trying to get a total of price of all the items multiplied by the quantity of the item:
const shoppingCart = {
"tax": .08,
"items": [
{
"title": "orange juice",
"price": 3.99,
"quantity": 1
},
{
"title": "rice",
"price": 1.99,
"quantity": 3
The result I want to get is 9.96. But I'm struggling to come up with a proper way to do so.
Using a for loop
let totalPrice = 0
shoppingCart.items.forEach(item => {
totalPrice += item.price * item.quantity
})
But in JS it's also useful to get used to different iterators such as reduce. It may appear a bit confusing at first but basically it just loops through the array, applies some logic (that we can add) and returns a single value which is perfect for computing sum.
const totalPrice = shoppingCart.items.reduce((total, item) => total + (item.price * item.quantity), 0)
Hope it helps!