Arithmetic operators in Javascript - Mini Project: Build & Apply

Arithmetic Operators Practice

📖 Scenario: You are helping a small shop calculate prices and discounts for their products. You will use arithmetic operators to do simple math calculations.

🎯 Goal: Build a small program that calculates the total price of items, applies a discount, and shows the final amount to pay.

📋 What You'll Learn

Create variables with exact values for product prices

Create a variable for discount percentage

Calculate total price and discounted price using arithmetic operators

Print the final price after discount

💡 Why This Matters

🌍 Real World

Calculating prices and discounts is common in shops and online stores to show customers how much they pay.

💼 Career

Understanding arithmetic operators is essential for any programming job that involves calculations, such as web development, data analysis, or game programming.

1

Create product price variables

Create three variables called price1, price2, and price3 with values 10, 20, and 30 respectively.

Javascript

// Create variables price1, price2, and price3 with values 10, 20, and 30
// Your code here

Need a hint?

Use let to create variables and assign the exact numbers.

2

Create discount percentage variable

Create a variable called discountPercent and set it to 10 to represent a 10% discount.

Javascript

let price1 = 10;
let price2 = 20;
let price3 = 30;
// Create variable discountPercent with value 10
// Your code here

Need a hint?

Remember to use let and assign the number 10.

3

Calculate total and discounted price

Create a variable called totalPrice that adds price1, price2, and price3. Then create a variable called discountedPrice that subtracts the discount amount from totalPrice. Use arithmetic operators to calculate the discount amount as totalPrice * discountPercent / 100.

Javascript

let price1 = 10;
let price2 = 20;
let price3 = 30;
let discountPercent = 10;
// Calculate totalPrice by adding price1, price2, and price3
// Calculate discountedPrice by subtracting discount from totalPrice
// Your code here

Need a hint?

Use + to add prices and -, *, and / to calculate the discount.

4

Print the final discounted price

Write a console.log statement to print the text "Final price after discount: " followed by the value of discountedPrice.

Javascript

let price1 = 10;
let price2 = 20;
let price3 = 30;
let discountPercent = 10;
let totalPrice = price1 + price2 + price3;
let discountedPrice = totalPrice - (totalPrice * discountPercent / 100);
// Print the final discounted price
// Your code here

Need a hint?

Use console.log and string concatenation with +.