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

id, title, challengeType, videoUrl, forumTopicId

id	title	challengeType	videoUrl	forumTopicId
bd7123c9c450eddfaeb5bdef	Use Bracket Notation to Find the Nth Character in a String	1	https://scrimba.com/c/cWPVJua	18343

Description

You can also use bracket notation to get the character at other positions within a string. Remember that computers start counting at 0, so the first character is actually the zeroth character.

Example:

var firstName = "Ada";
var secondLetterOfFirstName = firstName[1]; // secondLetterOfFirstName is "d"

Instructions

Let's try to set thirdLetterOfLastName to equal the third letter of the lastName variable using bracket notation. Hint: Try looking at the example above if you get stuck.

Tests

tests:
  - text: The <code>thirdLetterOfLastName</code> variable should have the value of <code>v</code>.
    testString: assert(thirdLetterOfLastName === 'v');
  - text: You should use bracket notation.
    testString: assert(code.match(/thirdLetterOfLastName\s*?=\s*?lastName\[.*?\]/));

Challenge Seed

// Setup
var lastName = "Lovelace";

// Only change code below this line
var thirdLetterOfLastName = lastName; // Change this line

After Test

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

Solution

var lastName = "Lovelace";
var thirdLetterOfLastName = lastName[2];