freeCodeCamp/curriculum/challenges/japanese/15-javascript-algorithms-an.../learn-basic-javascript-by-b.../62a3a0a3c0a4b32915d26a6e.md

133 lines
2.9 KiB
Markdown
Raw Normal View History

---
id: 62a3a0a3c0a4b32915d26a6e
title: Step 19
challengeType: 0
dashedName: step-19
---
# --description--
Remove your `console.log("Hello World");` line to begin writing your project code.
In JavaScript, a <dfn>variable</dfn> is used to hold a value. To use a variable, you must first <dfn>declare</dfn> it. For example, to declare a variable called `camperbot`, you would write:
```js
var camperbot;
```
The `var` keyword tells JavaScript you are declaring a variable. Declare a variable called `xp`.
# --hints--
You should not have a `console.log("Hello World");` line in your code.
```js
assert.notMatch(code, /console\.log\("Hello World"\);/);
```
You should use the `var` keyword to declare your variable.
```js
assert.match(code, /var/);
```
You should declare a variable named `xp`.
```js
assert.match(code, /xp/);
```
You should not assign a value to your variable.
```js
assert.notMatch(code, /var xp =/);
```
Don't forget the semi-colon at the end of the line.
```js
assert.match(code, /var xp;/);
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="./styles.css">
<title>RPG - Dragon Repeller</title>
<script src="./script.js"></script>
</head>
<body>
<div id="game">
<div id="stats">
<span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
<span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
<span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
</div>
<div id="controls">
<button id="button1">Go to store</button>
<button id="button2">Go to cave</button>
<button id="button3">Fight dragon</button>
</div>
<div id="monsterStats">
<span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
<span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
</div>
<div id="text">
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.
</div>
</div>
</body>
</html>
```
```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
--fcc-editable-region--
console.log("Hello World");
--fcc-editable-region--
```