In this lesson, you'll practice manipulating strings in JavaScript through a series of exercises. These exercises will help reinforce your understanding of string methods and operations.

Strings Exercise

We have a string representing a list of guests:

const guestList = 'Our guests are: emma, jacob, isabella, ethan';

Let's perform a series of operations on this string.

1. Get the Length of the String

Get the length of the string and store it in a variable called . ** Expected output:

console.log(length); // 44

2. Uppercase the Entire String

Uppercase the entire string and store the result in a variable called .

Expected output:

console.log(uppercasedGuestList); // OUR GUESTS ARE: EMMA, JACOB, ISABELLA, ETHAN

3. Check if 'ETHAN' is on the List

Check whether is on the . Store the answer in a variable called . The data type of the variable must be a boolean.

Expected output:

console.log(isEthanOnTheList); // true

4. Create a Substring of Guest Names

Create a substring that only contains . Store the answer in a variable called .

Expected output:

console.log(substringGuests); // 'EMMA, JACOB, ISABELLA, ETHAN'

5. Create an Array of Guest Names

Out of the substring you just created, create an array of names of people that are on the list. Store that array in a variable called .

Expected output:

console.log(guests); // [ 'EMMA', 'JACOB', 'ISABELLA', 'ETHAN' ]

Solutions

Here are the solutions to the exercises:

// 1. Get the Length of the String
const length = guestList.length;
console.log(length); // 44

// 2. Uppercase the Entire String
const uppercasedGuestList = guestList.toUpperCase();
console.log(uppercasedGuestList); // OUR GUESTS ARE: EMMA, JACOB, ISABELLA, ETHAN

// 3. Check if 'ETHAN' is on the List
const isEthanOnTheList = uppercasedGuestList.includes('ETHAN');
console.log(isEthanOnTheList); // true

// 4. Create a Substring of Guest Names
const substringGuests = uppercasedGuestList.slice(17);
console.log(substringGuests); // 'EMMA, JACOB, ISABELLA, ETHAN'

// 5. Create an Array of Guest Names
const guests = substringGuests.split(', ');
console.log(guests); // [ 'EMMA', 'JACOB', 'ISABELLA', 'ETHAN' ]

These exercises provide hands-on practice with string methods, helping you become more comfortable with text manipulation in JavaScript.

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