77 lines
1.5 KiB
Markdown
77 lines
1.5 KiB
Markdown
---
|
|
id: 56533eb9ac21ba0edf2244ed
|
|
title: Appending Variables to Strings
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cbQmZfa'
|
|
forumTopicId: 16656
|
|
---
|
|
|
|
# --description--
|
|
|
|
Just as we can build a string over multiple lines out of string <dfn>literals</dfn>, we can also append variables to a string using the plus equals (`+=`) operator.
|
|
|
|
Example:
|
|
|
|
```js
|
|
var anAdjective = "awesome!";
|
|
var ourStr = "freeCodeCamp is ";
|
|
ourStr += anAdjective;
|
|
// ourStr is now "freeCodeCamp is awesome!"
|
|
```
|
|
|
|
# --instructions--
|
|
|
|
Set `someAdjective` to a string of at least 3 characters and append it to `myStr` using the `+=` operator.
|
|
|
|
# --hints--
|
|
|
|
`someAdjective` should be set to a string at least 3 characters long.
|
|
|
|
```js
|
|
assert(typeof someAdjective !== 'undefined' && someAdjective.length > 2);
|
|
```
|
|
|
|
You should append `someAdjective` to `myStr` using the `+=` operator.
|
|
|
|
```js
|
|
assert(code.match(/myStr\s*\+=\s*someAdjective\s*/).length > 0);
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --after-user-code--
|
|
|
|
```js
|
|
(function(){
|
|
var output = [];
|
|
if(typeof someAdjective === 'string') {
|
|
output.push('someAdjective = "' + someAdjective + '"');
|
|
} else {
|
|
output.push('someAdjective is not a string');
|
|
}
|
|
if(typeof myStr === 'string') {
|
|
output.push('myStr = "' + myStr + '"');
|
|
} else {
|
|
output.push('myStr is not a string');
|
|
}
|
|
return output.join('\n');
|
|
})();
|
|
```
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
// Change code below this line
|
|
|
|
var someAdjective;
|
|
var myStr = "Learning to code is ";
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
var someAdjective = "neat";
|
|
var myStr = "Learning to code is ";
|
|
myStr += someAdjective;
|
|
```
|