freeCodeCamp/curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-bracket-notation-to-find-the-nth-to-last-character-in-a-string.english.md

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
bd7123c9c452eddfaeb5bdef	Use Bracket Notation to Find the Nth-to-Last Character in a String	1	https://scrimba.com/c/cw4vkh9	18344

Description

You can use the same principle we just used to retrieve the last character in a string to retrieve the Nth-to-last character. For example, you can get the value of the third-to-last letter of the var firstName = "Charles" string by using firstName[firstName.length - 3]

Instructions

Use bracket notation to find the second-to-last character in the lastName string. Hint
Try looking at the thirdToLastLetterOfFirstName variable declaration if you get stuck.

Tests

tests:
  - text: <code>secondToLastLetterOfLastName</code> should be "c".
    testString: assert(secondToLastLetterOfLastName === 'c');
  - text: You have to use <code>.length</code> to get the second last letter.
    testString: assert(code.match(/\.length/g).length === 2);

Challenge Seed

// Example
var firstName = "Ada";
var thirdToLastLetterOfFirstName = firstName[firstName.length - 3];

// Setup
var lastName = "Lovelace";

// Only change code below this line
var secondToLastLetterOfLastName = lastName;

After Test

(function(v){return v;})(secondToLastLetterOfLastName);

Solution

var firstName = "Ada";
var thirdToLastLetterOfFirstName = firstName[firstName.length - 3];

var lastName = "Lovelace";
var secondToLastLetterOfLastName = lastName[lastName.length - 2];