409c39abf1
* feat(curriculum): Add Basic JS Scrimba links * Fix: Add missing video url. * fix: update videoUrl
86 lines
2.3 KiB
Markdown
86 lines
2.3 KiB
Markdown
---
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id: bd7123c9c448eddfaeb5bdef
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title: Find the Length of a String
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cvmqEAd'
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---
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## Description
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<section id='description'>
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You can find the length of a <code>String</code> value by writing <code>.length</code> after the string variable or string literal.
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<code>"Alan Peter".length; // 10</code>
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For example, if we created a variable <code>var firstName = "Charles"</code>, we could find out how long the string <code>"Charles"</code> is by using the <code>firstName.length</code> property.
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</section>
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## Instructions
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<section id='instructions'>
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Use the <code>.length</code> property to count the number of characters in the <code>lastName</code> variable and assign it to <code>lastNameLength</code>.
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>lastNameLength</code> should be equal to eight.
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testString: assert((function(){if(typeof lastNameLength !== "undefined" && typeof lastNameLength === "number" && lastNameLength === 8){return true;}else{return false;}})(), '<code>lastNameLength</code> should be equal to eight.');
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- text: 'You should be getting the length of <code>lastName</code> by using <code>.length</code> like this: <code>lastName.length</code>.'
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testString: 'assert((function(){if(code.match(/\.length/gi) && code.match(/\.length/gi).length >= 2 && code.match(/var lastNameLength \= 0;/gi) && code.match(/var lastNameLength \= 0;/gi).length >= 1){return true;}else{return false;}})(), ''You should be getting the length of <code>lastName</code> by using <code>.length</code> like this: <code>lastName.length</code>.'');'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// Example
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var firstNameLength = 0;
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var firstName = "Ada";
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firstNameLength = firstName.length;
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// Setup
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var lastNameLength = 0;
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var lastName = "Lovelace";
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// Only change code below this line.
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lastNameLength = lastName;
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```
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</div>
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### After Test
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<div id='js-teardown'>
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```js
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if(typeof lastNameLength !== "undefined"){(function(){return lastNameLength;})();}
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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var firstNameLength = 0;
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var firstName = "Ada";
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firstNameLength = firstName.length;
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var lastNameLength = 0;
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var lastName = "Lovelace";
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lastNameLength = lastName.length;
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```
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</section>
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