Composite formatting in C Sharp (C#) - Mini Project: Build & Apply

Composite Formatting in C#

📖 Scenario: You are creating a simple program to display information about a product in a store. You want to show the product's name, price, and quantity in a neat sentence.

🎯 Goal: Build a C# program that uses composite formatting to display product details in a formatted string.

📋 What You'll Learn

Create variables for product name, price, and quantity with exact values.

Create a format string variable using composite formatting placeholders.

Use string.Format with the format string and variables to create the final message.

Print the final formatted message to the console.

💡 Why This Matters

🌍 Real World

Composite formatting is used in many programs to create readable messages by inserting variable values into strings, such as receipts, reports, or user messages.

💼 Career

Understanding composite formatting helps you display data clearly in applications, which is a common task in software development jobs.

1

Create product variables

Create a string variable called productName and set it to "Laptop". Create a double variable called price and set it to 999.99. Create an int variable called quantity and set it to 5.

C Sharp (C#)

// Your code here

Need a hint?

Use string for text, double for decimal numbers, and int for whole numbers.

2

Create the format string

Create a string variable called formatString and set it to "Product: {0}, Price: ${1}, Quantity: {2}". This string uses composite formatting placeholders.

C Sharp (C#)

string productName = "Laptop";
double price = 999.99;
int quantity = 5;
// Your code here

Need a hint?

Use curly braces with numbers inside to mark where variables will go.

3

Use string.Format with variables

Create a string variable called message and set it to the result of string.Format(formatString, productName, price, quantity).

C Sharp (C#)

string productName = "Laptop";
double price = 999.99;
int quantity = 5;
string formatString = "Product: {0}, Price: ${1}, Quantity: {2}";
// Your code here

Need a hint?

Use string.Format with the format string and variables in order.

4

Print the formatted message

Write Console.WriteLine(message); to display the formatted product details on the screen.

C Sharp (C#)

string productName = "Laptop";
double price = 999.99;
int quantity = 5;
string formatString = "Product: {0}, Price: ${1}, Quantity: {2}";
string message = string.Format(formatString, productName, price, quantity);
// Your code here

Need a hint?

Use Console.WriteLine to print the message variable.