---
id: 62a8ca22d29fe62f3952bdf5
title: Step 85
challengeType: 0
dashedName: step-85
---
# --description--
Increasing a value by 1, or incrementing, has a special operator in JavaScript: `++`. If you wanted to increase `num` by 1, you could write `num++`.
Change your `currentWeapon` assignment to use the increment operator.
# --hints--
You should use the increment operator to increase `currentWeapon` by `1`.
```js
assert.match(buyWeapon.toString(), /currentWeapon\s*\+\s*\+/);
```
You should not use compound assignment to increase `currentWeapon` by `1`.
```js
assert.notMatch(buyWeapon.toString(), /currentWeapon\s*\+=\s*1/);
```
# --seed--
## --seed-contents--
```html
RPG - Dragon Repeller
XP: 0Health: 100Gold: 50
Monster Name: Health:
Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
```
```css
body {
background-color: darkblue;
}
#text {
background-color: black;
color: white;
padding: 10px;
}
#game {
max-width: 500px;
max-height: 400px;
background-color: lightgray;
color: white;
margin: 0 auto;
padding: 10px;
}
#controls, #stats {
border: 1px solid black;
padding: 5px;
color: black;
}
#monsterStats {
display: none;
border: 1px solid black;
padding: 5px;
color: white;
background-color: red;
}
.stat {
padding-right: 10px;
}
```
```js
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() {
update(locations[0]);
}
function goStore() {
update(locations[1]);
}
function goCave() {
update(locations[2]);
}
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.";
}
}
--fcc-editable-region--
function buyWeapon() {
if (gold >= 30) {
gold -= 30;
currentWeapon += 1;
}
}
--fcc-editable-region--
function fightSlime() {
}
function fightBeast() {
}
```