Why operators matter in C Sharp (C#) - See It in Action

Why operators matter

📖 Scenario: Imagine you are helping a small shop owner calculate the total price of items bought by customers. You need to use operators to add prices and calculate discounts.

🎯 Goal: You will create a simple program that uses operators to add item prices and apply a discount.

📋 What You'll Learn

Create variables to store item prices

Create a variable to store a discount percentage

Use operators to calculate the total price before discount

Use operators to apply the discount to the total price

Print the final price after discount

💡 Why This Matters

🌍 Real World

Shop owners and cashiers use operators to calculate totals and discounts quickly and accurately.

💼 Career

Understanding operators is essential for any programming job that involves calculations, such as finance, sales, or inventory management.

1

Create item price variables

Create three double variables called item1, item2, and item3 with values 10.5, 20.0, and 5.25 respectively.

C Sharp (C#)

// Create three double variables item1, item2, and item3 with the given values
// Your code here

Need a hint?

Use the syntax double variableName = value; to create variables.

2

Create discount variable

Create a double variable called discount and set it to 0.1 to represent a 10% discount.

C Sharp (C#)

double item1 = 10.5;
double item2 = 20.0;
double item3 = 5.25;
// Create a double variable discount and set it to 0.1
// Your code here

Need a hint?

Remember to use double discount = 0.1; to create the discount variable.

3

Calculate total price and apply discount

Create a double variable called totalPrice that adds item1, item2, and item3. Then create a double variable called finalPrice that subtracts the discount amount from totalPrice using the discount variable.

C Sharp (C#)

double item1 = 10.5;
double item2 = 20.0;
double item3 = 5.25;
double discount = 0.1;
// Calculate totalPrice by adding item1, item2, and item3
// Calculate finalPrice by subtracting discount amount from totalPrice
// Your code here

Need a hint?

Use the + operator to add prices and - operator to subtract the discount amount.

4

Print the final price

Write a Console.WriteLine statement to print the text "Final price: " followed by the value of finalPrice.

C Sharp (C#)

double item1 = 10.5;
double item2 = 20.0;
double item3 = 5.25;
double discount = 0.1;
double totalPrice = item1 + item2 + item3;
double finalPrice = totalPrice - (totalPrice * discount);
// Print the final price with a message
// Your code here

Need a hint?

Use Console.WriteLine("Final price: " + finalPrice); to print the result.