70 lines
1.5 KiB
Markdown
70 lines
1.5 KiB
Markdown
---
|
|
id: bd7123c9c448eddfaeb5bdef
|
|
title: Find the Length of a String
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cvmqEAd'
|
|
forumTopicId: 18182
|
|
dashedName: find-the-length-of-a-string
|
|
---
|
|
|
|
# --description--
|
|
|
|
You can find the length of a `String` value by writing `.length` after the string variable or string literal.
|
|
|
|
```js
|
|
console.log("Alan Peter".length);
|
|
```
|
|
|
|
The value `10` would be displayed in the console.
|
|
|
|
For example, if we created a variable `var firstName = "Charles"`, we could find out how long the string `Charles` is by using the `firstName.length` property.
|
|
|
|
# --instructions--
|
|
|
|
Use the `.length` property to count the number of characters in the `lastName` variable and assign it to `lastNameLength`.
|
|
|
|
# --hints--
|
|
|
|
You should not change the variable declarations in the `// Setup` section.
|
|
|
|
```js
|
|
assert(
|
|
code.match(/var lastNameLength = 0;/) &&
|
|
code.match(/var lastName = "Lovelace";/)
|
|
);
|
|
```
|
|
|
|
`lastNameLength` should be equal to eight.
|
|
|
|
```js
|
|
assert(typeof lastNameLength !== 'undefined' && lastNameLength === 8);
|
|
```
|
|
|
|
You should be getting the length of `lastName` by using `.length` like this: `lastName.length`.
|
|
|
|
```js
|
|
assert(code.match(/=\s*lastName\.length/g) && !code.match(/lastName\s*=\s*8/));
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
// Setup
|
|
var lastNameLength = 0;
|
|
var lastName = "Lovelace";
|
|
|
|
// Only change code below this line
|
|
|
|
lastNameLength = lastName;
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
var lastNameLength = 0;
|
|
var lastName = "Lovelace";
|
|
lastNameLength = lastName.length;
|
|
```
|