Why variables are needed in Javascript - See It in Action

Why variables are needed

📖 Scenario: Imagine you are organizing a small party. You need to keep track of how many guests will come, what snacks to buy, and how much money you have to spend. Variables in programming help you store and remember such information so you can use it later.

🎯 Goal: You will create variables to store information about a party and then use those variables to display a message about the party details.

📋 What You'll Learn

Create variables with exact names and values as instructed

Use variables to build a message string

Print the message to the console

💡 Why This Matters

🌍 Real World

Variables are like labeled boxes where you keep important information. In real life, you might write down a shopping list or keep track of your allowance. In programming, variables help keep track of data so the computer can use it.

💼 Career

Understanding variables is the first step in programming. Every software developer uses variables to store and manage data, making this skill essential for any coding job.

1

Create variables for party details

Create a variable called guestCount and set it to 10. Create another variable called snack and set it to "chips".

Javascript

// Create variables guestCount and snack with given values
// Your code here

Need a hint?

Use let to create variables and assign the exact values given.

2

Add a variable for budget

Create a variable called budget and set it to 50.

Javascript

let guestCount = 10;
let snack = "chips";
// Create variable budget with value 50
// Your code here

Need a hint?

Remember to use let and assign the number 50 to budget.

3

Create a message using variables

Create a variable called message and set it to a string using the variables guestCount, snack, and budget in this exact format: `We have ${guestCount} guests coming, will buy ${snack}, and have $${budget} to spend.`

Javascript

let guestCount = 10;
let snack = "chips";
let budget = 50;
// Create message string using guestCount, snack, and budget
// Your code here

Need a hint?

Use backticks ` to create a template string and insert variables with ${}.

4

Display the message

Use console.log to print the variable message.

Javascript

let guestCount = 10;
let snack = "chips";
let budget = 50;
let message = `We have ${guestCount} guests coming, will buy ${snack}, and have $${budget} to spend.`;
// Print the message to the console
// Your code here

Need a hint?

Use console.log(message); to show the message in the console.