Arithmetic operators in PowerShell - Mini Project: Build & Apply

Arithmetic operators

📖 Scenario: You are helping a small shop owner calculate the total cost of items bought by a customer. You will use arithmetic operators in PowerShell to add, subtract, multiply, and divide numbers.

🎯 Goal: Build a simple PowerShell script that uses arithmetic operators to calculate the total price, discount, tax, and final amount to pay.

📋 What You'll Learn

Create variables for item prices and quantities

Create a variable for discount percentage

Calculate total price before discount

Calculate discount amount using multiplication

Calculate price after discount using subtraction

Calculate tax amount using multiplication

Calculate final price using addition

Print the final price

💡 Why This Matters

🌍 Real World

Calculating prices, discounts, and taxes is common in retail and billing systems.

💼 Career

Understanding arithmetic operators helps automate calculations in scripts for finance, sales, and inventory management.

1

Create item price and quantity variables

Create two variables: $price with value 15 and $quantity with value 4.

PowerShell

# Create variables $price and $quantity with values 15 and 4
# Your code here

Need a hint?

Use = to assign values to variables in PowerShell.

2

Add a discount percentage variable

Create a variable called $discountPercent and set it to 10 (which means 10%).

PowerShell

$price = 15
$quantity = 4
# Create variable $discountPercent with value 10
# Your code here

Need a hint?

Remember to use $ before variable names in PowerShell.

3

Calculate total price and discount amount

Calculate the total price before discount by multiplying $price and $quantity and store it in $totalPrice. Then calculate the discount amount by multiplying $totalPrice with $discountPercent divided by 100, and store it in $discountAmount.

PowerShell

$price = 15
$quantity = 4
$discountPercent = 10
# Calculate $totalPrice and $discountAmount
# Your code here

Need a hint?

Use * for multiplication and / for division in PowerShell.

4

Calculate final price and print it

Calculate the price after discount by subtracting $discountAmount from $totalPrice and store it in $priceAfterDiscount. Then calculate tax amount as 5% of $priceAfterDiscount and store it in $taxAmount. Finally, calculate the final price by adding $priceAfterDiscount and $taxAmount and store it in $finalPrice. Print the value of $finalPrice.

PowerShell

$price = 15
$quantity = 4
$discountPercent = 10
$totalPrice = $price * $quantity
$discountAmount = $totalPrice * ($discountPercent / 100)
# Calculate $priceAfterDiscount, $taxAmount, $finalPrice
# Print $finalPrice
# Your code here

Need a hint?

Use - for subtraction and + for addition. Use Write-Output to print in PowerShell.