76 lines
2.3 KiB
Markdown
76 lines
2.3 KiB
Markdown
---
|
||
id: bd7123c9c448eddfaeb5bdef
|
||
title: Find the Length of a String
|
||
challengeType: 1
|
||
videoUrl: https://scrimba.com/c/cvmqEAd
|
||
forumTopicId: 18182
|
||
localeTitle: Найти длину строки
|
||
---
|
||
|
||
## Description
|
||
<section id='description'>
|
||
Вы можете найти длину значения <code>String</code> , написав <code>.length</code> после строковой переменной или строкового литерала. <code>"Alan Peter".length; // 10</code> Например, если мы создали переменную <code>var firstName = "Charles"</code> , мы могли бы узнать, как долго строка <code>"Charles"</code> используется с использованием свойства <code>firstName.length</code> .
|
||
</section>
|
||
|
||
## Instructions
|
||
<section id='instructions'>
|
||
Используйте свойство <code>.length</code> чтобы подсчитать количество символов в переменной <code>lastName</code> и назначить его <code>lastNameLength</code> .
|
||
</section>
|
||
|
||
## Tests
|
||
<section id='tests'>
|
||
|
||
```yml
|
||
tests:
|
||
- text: You should not change the variable declarations in the <code>// Setup</code> section.
|
||
testString: assert(code.match(/var lastNameLength = 0;/) && code.match(/var lastName = "Lovelace";/));
|
||
- text: <code>lastNameLength</code> should be equal to eight.
|
||
testString: assert(typeof lastNameLength !== 'undefined' && lastNameLength === 8);
|
||
- text: 'You should be getting the length of <code>lastName</code> by using <code>.length</code> like this: <code>lastName.length</code>.'
|
||
testString: assert(code.match(/=\s*lastName\.length/g) && !code.match(/lastName\s*=\s*8/));
|
||
|
||
```
|
||
|
||
</section>
|
||
|
||
## Challenge Seed
|
||
<section id='challengeSeed'>
|
||
|
||
<div id='js-seed'>
|
||
|
||
```js
|
||
// Example
|
||
var firstNameLength = 0;
|
||
var firstName = "Ada";
|
||
|
||
firstNameLength = firstName.length;
|
||
|
||
// Setup
|
||
var lastNameLength = 0;
|
||
var lastName = "Lovelace";
|
||
|
||
// Only change code below this line.
|
||
|
||
lastNameLength = lastName;
|
||
|
||
```
|
||
|
||
</div>
|
||
|
||
</section>
|
||
|
||
## Solution
|
||
<section id='solution'>
|
||
|
||
```js
|
||
var firstNameLength = 0;
|
||
var firstName = "Ada";
|
||
firstNameLength = firstName.length;
|
||
|
||
var lastNameLength = 0;
|
||
var lastName = "Lovelace";
|
||
lastNameLength = lastName.length;
|
||
```
|
||
|
||
</section>
|