Find and fix three bugs

The challenge

cartTotal(items) should add up price × qty for every item. But Buggsy got to it first. Fix it so all the tests pass.

Try it

Write your answer below, then press Check my answer. Your code runs right here in your browser, and the tests tell you what works.

What the tests check

• cartTotal([{ price: 10, qty: 2 }, { price: 5, qty: 1 }]) gives 25
• cartTotal([{ price: 3, qty: 3 }]) gives 9
• cartTotal([]) gives 0

Hints

Stuck? Open one hint at a time. Try again after each one.

A solution

There’s always more than one right way. Read it, make sure you understand it, then try writing it yourself without looking.

function cartTotal(items) {
  let total = 0;
  for (let i = 0; i < items.length; i++) {
    total += items[i].price * items[i].qty;
  }
  return total;
}

Learn what you need

This exercise uses what Summer School: Debugging: Becoming a Bug Detective teaches. Read those notes first if any of it is new.