Learn Basic JavaScript by Building a Role Playing Game - Step 84

Tell us what’s happening: Hello, I am putting the code in thec orrect way that I believe, but it keeps giving me some problems… I don’t know what I must do. Someone can tell me what the solution is. Thanks.

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Learn Basic JavaScript by Building a Role Playing Game - Step 84


30 - gold is not the same as having the new value of gold be 30 less than the previous value

So, what’s the previous value. Thanks.

the previous value is the value of gold before the line execute

but consider that the previous value is 100, what happens in your line of code? what is the new value assigned to gold?

The instructions also state:

Similar to your buyHealth function

I would check out that function and use a similar approach

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Sorry I send the wrong photo, that is the correct:

Please post your actual code instead of a screenshot. Thanks

let xp = 0;
let health = 100;
let gold = 50;
let currentWeapon = 0;
let fighting;
let monsterHealth;
let inventory = ["stick"];

const button1 = document.querySelector('#button1');
const button2 = document.querySelector("#button2");
const button3 = document.querySelector("#button3");
const text = document.querySelector("#text");
const xpText = document.querySelector("#xpText");
const healthText = document.querySelector("#healthText");
const goldText = document.querySelector("#goldText");
const monsterStats = document.querySelector("#monsterStats");
const monsterName = document.querySelector("#monsterName");
const monsterHealthText = document.querySelector("#monsterHealth");
const weapons = [
  { name: 'stick', power: 5 },
  { name: 'dagger', power: 30 },
  { name: 'claw hammer', power: 50 },
  { name: 'sword', power: 100 }
const locations = [
    name: "town square",
    "button text": ["Go to store", "Go to cave", "Fight dragon"],
    "button functions": [goStore, goCave, fightDragon],
    text: "You are in the town square. You see a sign that says \"Store\"."
    name: "store",
    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
    "button functions": [buyHealth, buyWeapon, goTown],
    text: "You enter the store."
    name: "cave",
    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
    "button functions": [fightSlime, fightBeast, goTown],
    text: "You enter the cave. You see some monsters."

// initialize buttons
button1.onclick = goStore;
button2.onclick = goCave;
button3.onclick = fightDragon;

function update(location) {
  button1.innerText = location["button text"][0];
  button2.innerText = location["button text"][1];
  button3.innerText = location["button text"][2];
  button1.onclick = location["button functions"][0];
  button2.onclick = location["button functions"][1];
  button3.onclick = location["button functions"][2];
  text.innerText = location.text;

function goTown() {

function goStore() {

function goCave() {

function fightDragon() {
  console.log("Fighting dragon.");

function buyHealth() {
  if (gold >= 10) {
    gold -= 10;
    health += 10;
    goldText.innerText = gold;
    healthText.innerText = health;
  } else {
    text.innerText = "You do not have enough gold to buy health.";

function buyWeapon() { 
  if (gold >= 30) { 
    gold = gold - 30;

function fightSlime() {


function fightBeast() {


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Dear friends, thanks for the help, I already found the solution. I let it here for the people who needs that.

function buyWeapon() { 
  if (gold >= 30) { 
    gold -= 30;
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