Arithmetic operators in Kotlin - Mini Project: Build & Apply

Arithmetic Operators in Kotlin

📖 Scenario: You are helping a small shop owner calculate prices and discounts for products.

🎯 Goal: Build a Kotlin program that uses arithmetic operators to calculate the total price after discount and tax.

📋 What You'll Learn

Create variables for product price and discount percentage

Create a variable for tax rate

Calculate the discounted price using subtraction and multiplication

Calculate the final price by adding tax

Print the final price

💡 Why This Matters

🌍 Real World

Calculating prices with discounts and taxes is common in shopping and billing systems.

💼 Career

Understanding arithmetic operators is essential for any programming job that involves calculations or data processing.

1

Create product price and discount variables

Create a Double variable called productPrice and set it to 100.0. Create another Double variable called discountPercent and set it to 15.0.

Kotlin

# Your code here

Need a hint?

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

2

Add tax rate variable

Add a Double variable called taxRate and set it to 8.0 to represent 8% tax.

Kotlin

val productPrice: Double = 100.0
val discountPercent: Double = 15.0
# Your code here

Need a hint?

Remember to use val and assign the exact value 8.0.

3

Calculate discounted price and final price

Create a Double variable called discountedPrice that calculates the price after discount using subtraction and multiplication. Then create a Double variable called finalPrice that adds tax to the discounted price using multiplication and addition.

Kotlin

val productPrice: Double = 100.0
val discountPercent: Double = 15.0
val taxRate: Double = 8.0
# Your code here

Need a hint?

Use arithmetic operators -, *, /, and + to calculate prices.

4

Print the final price

Write a println statement to display the finalPrice variable.

Kotlin

val productPrice: Double = 100.0
val discountPercent: Double = 15.0
val taxRate: Double = 8.0
val discountedPrice: Double = productPrice - (productPrice * discountPercent / 100)
val finalPrice: Double = discountedPrice + (discountedPrice * taxRate / 100)
# Your code here

Need a hint?

Use println(finalPrice) to show the result.