5a3d22e76b
* changing Charles -> Ada in JavaScript challenge descriptions * fix: changing Charles -> Ada in JavaScript challenge descriptions * fix: changing firstName value from Ada to Augusta in javascript lesson
69 lines
1.4 KiB
Markdown
69 lines
1.4 KiB
Markdown
---
|
|
id: bd7123c9c451eddfaeb5bdef
|
|
title: Use Bracket Notation to Find the Last Character in a String
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/cBZQGcv'
|
|
forumTopicId: 18342
|
|
dashedName: use-bracket-notation-to-find-the-last-character-in-a-string
|
|
---
|
|
|
|
# --description--
|
|
|
|
In order to get the last letter of a string, you can subtract one from the string's length.
|
|
|
|
For example, if `var firstName = "Ada"`, you can get the value of the last letter of the string by using `firstName[firstName.length - 1]`.
|
|
|
|
Example:
|
|
|
|
```js
|
|
var firstName = "Ada";
|
|
var lastLetter = firstName[firstName.length - 1];
|
|
```
|
|
|
|
`lastLetter` would have a value of the string `a`.
|
|
|
|
# --instructions--
|
|
|
|
Use <dfn>bracket notation</dfn> to find the last character in the `lastName` variable.
|
|
|
|
**Hint:** Try looking at the example above if you get stuck.
|
|
|
|
# --hints--
|
|
|
|
`lastLetterOfLastName` should be the letter `e`.
|
|
|
|
```js
|
|
assert(lastLetterOfLastName === 'e');
|
|
```
|
|
|
|
You should use `.length` to get the last letter.
|
|
|
|
```js
|
|
assert(code.match(/\.length/g).length > 0);
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --after-user-code--
|
|
|
|
```js
|
|
(function(v){return v;})(lastLetterOfLastName);
|
|
```
|
|
|
|
## --seed-contents--
|
|
|
|
```js
|
|
// Setup
|
|
var lastName = "Lovelace";
|
|
|
|
// Only change code below this line
|
|
var lastLetterOfLastName = lastName; // Change this line
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```js
|
|
var lastName = "Lovelace";
|
|
var lastLetterOfLastName = lastName[lastName.length - 1];
|
|
```
|