87 lines
1.9 KiB
Markdown
87 lines
1.9 KiB
Markdown
---
|
|
id: 56533eb9ac21ba0edf2244b9
|
|
title: Constructing Strings with Variables
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cqk8rf4'
|
|
forumTopicId: 16805
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
Sometimes you will need to build a string, <a href="https://en.wikipedia.org/wiki/Mad_Libs" target="_blank">Mad Libs</a> style. By using the concatenation operator (<code>+</code>), you can insert one or more variables into a string you're building.
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
Set <code>myName</code> to a string equal to your name and build <code>myStr</code> with <code>myName</code> between the strings <code>"My name is "</code> and <code>" and I am well!"</code>
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: <code>myName</code> should be set to a string at least 3 characters long
|
|
testString: assert(typeof myName !== 'undefined' && myName.length > 2);
|
|
- text: Use two <code>+</code> operators to build <code>myStr</code> with <code>myName</code> inside it
|
|
testString: assert(code.match(/["']\s*\+\s*myName\s*\+\s*["']/g).length > 0);
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
// Example
|
|
var ourName = "freeCodeCamp";
|
|
var ourStr = "Hello, our name is " + ourName + ", how are you?";
|
|
|
|
// Only change code below this line
|
|
var myName;
|
|
var myStr;
|
|
|
|
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
### After Test
|
|
<div id='js-teardown'>
|
|
|
|
```js
|
|
(function(){
|
|
var output = [];
|
|
if(typeof myName === 'string') {
|
|
output.push('myName = "' + myName + '"');
|
|
} else {
|
|
output.push('myName is not a string');
|
|
}
|
|
if(typeof myStr === 'string') {
|
|
output.push('myStr = "' + myStr + '"');
|
|
} else {
|
|
output.push('myStr is not a string');
|
|
}
|
|
return output.join('\n');
|
|
})();
|
|
```
|
|
|
|
</div>
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
|
|
```js
|
|
var myName = "Bob";
|
|
var myStr = "My name is " + myName + " and I am well!";
|
|
```
|
|
|
|
</section>
|