81 lines
1.7 KiB
Markdown
81 lines
1.7 KiB
Markdown
---
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id: bd7123c9c451eddfaeb5bdef
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title: Use Bracket Notation to Find the Last Character in a String
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challengeType: 1
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videoUrl: 'https://scrimba.com/c/cBZQGcv'
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forumTopicId: 18342
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---
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## Description
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<section id='description'>
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In order to get the last letter of a string, you can subtract one from the string's length.
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For example, if <code>var firstName = "Charles"</code>, you can get the value of the last letter of the string by using <code>firstName[firstName.length - 1]</code>.
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</section>
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## Instructions
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<section id='instructions'>
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Use <dfn>bracket notation</dfn> to find the last character in the <code>lastName</code> variable.
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<strong>Hint</strong><br>Try looking at the <code>lastLetterOfFirstName</code> variable declaration if you get stuck.
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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>lastLetterOfLastName</code> should be "e".
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testString: assert(lastLetterOfLastName === "e");
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- text: You should use <code>.length</code> to get the last letter.
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testString: assert(code.match(/\.length/g).length === 2);
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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 firstName = "Ada";
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var lastLetterOfFirstName = firstName[firstName.length - 1];
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// Setup
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var lastName = "Lovelace";
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// Only change code below this line.
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var lastLetterOfLastName = 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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(function(v){return v;})(lastLetterOfLastName);
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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 firstName = "Ada";
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var lastLetterOfFirstName = firstName[firstName.length - 1];
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var lastName = "Lovelace";
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var lastLetterOfLastName = lastName[lastName.length - 1];
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```
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</section>
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