Named arguments in C Sharp (C#) - Mini Project: Build & Apply

Using Named Arguments in C#

📖 Scenario: Imagine you are creating a simple program to calculate the total price of a product after applying a discount and adding tax. You want to make your code clear by using named arguments when calling the method.

🎯 Goal: Build a C# program that defines a method with multiple parameters and calls it using named arguments to improve readability.

📋 What You'll Learn

Create a method called CalculateTotalPrice with parameters price, discount, and tax.

Create variables for price, discount, and tax with exact values.

Call CalculateTotalPrice using named arguments in a different order than the method definition.

Print the result of the method call.

💡 Why This Matters

🌍 Real World

Named arguments make your code easier to read and understand, especially when methods have many parameters.

💼 Career

Using named arguments is a common practice in professional C# development to improve code clarity and reduce errors.

1

Create variables for price, discount, and tax

Create three variables: price with value 100.0, discount with value 0.1, and tax with value 0.05.

C Sharp (C#)

# Your code here

Need a hint?

Use double type for the variables and assign the exact values.

2

Define the CalculateTotalPrice method

Define a method called CalculateTotalPrice that takes three double parameters: price, discount, and tax. The method should return a double representing the final price after applying discount and adding tax.

C Sharp (C#)

double price = 100.0;
double discount = 0.1;
double tax = 0.05;

// Your code here

Need a hint?

Calculate discounted price first, then add tax, and return the final value.

3

Call CalculateTotalPrice using named arguments

Call the method CalculateTotalPrice using named arguments in this order: tax, price, and discount. Store the result in a variable called finalPrice.

C Sharp (C#)

double price = 100.0;
double discount = 0.1;
double tax = 0.05;

double CalculateTotalPrice(double price, double discount, double tax)
{
    double discountedPrice = price - (price * discount);
    double totalPrice = discountedPrice + (discountedPrice * tax);
    return totalPrice;
}

// Your code here

Need a hint?

Use the syntax parameterName: value to pass named arguments in any order.

4

Print the final price

Print the value of the variable finalPrice using Console.WriteLine.

C Sharp (C#)

double price = 100.0;
double discount = 0.1;
double tax = 0.05;

double CalculateTotalPrice(double price, double discount, double tax)
{
    double discountedPrice = price - (price * discount);
    double totalPrice = discountedPrice + (discountedPrice * tax);
    return totalPrice;
}

double finalPrice = CalculateTotalPrice(tax: tax, price: price, discount: discount);

// Your code here

Need a hint?

Use Console.WriteLine(finalPrice); to print the result.