Why understanding memory matters in C# - See It in Action

Why understanding memory matters in C#

📖 Scenario: Imagine you are building a simple program to manage a list of books in a library. Each book has a title and a number of pages. You want to understand how memory works in C# to write efficient code that uses memory wisely.

🎯 Goal: You will create a small program that stores book information, uses a variable to track memory usage, processes the data, and then prints the results. This will help you see why understanding memory matters in C#.

📋 What You'll Learn

Create a list of books with exact titles and page counts

Add a variable to track total pages

Use a loop to sum the pages of all books

Print the total pages to show memory usage

💡 Why This Matters

🌍 Real World

Managing collections of data like books, users, or products is common in software. Knowing how memory works helps keep programs fast and stable.

💼 Career

Many programming jobs require understanding how data is stored and processed in memory to optimize performance and avoid errors.

1

Create the list of books

Create a list called books that contains these exact entries: ("C# Basics", 300), ("Memory Management", 450), and ("Advanced C#", 500). Use a list of tuples where each tuple has a string and an int.

C Sharp (C#)

// Create the list of books with exact titles and page counts
// Your code here

Need a hint?

Use new List<(string Title, int Pages)> { ... } to create the list with tuples.

2

Add a variable to track total pages

Create an integer variable called totalPages and set it to 0. This will track the total number of pages in all books.

C Sharp (C#)

var books = new List
{
    ("C# Basics", 300),
    ("Memory Management", 450),
    ("Advanced C#", 500)
};

// Create totalPages variable and set to 0
// Your code here

Need a hint?

Use int totalPages = 0; to create the variable.

3

Sum the pages using a loop

Use a foreach loop with the variable book to go through books. Inside the loop, add book.Pages to totalPages.

C Sharp (C#)

var books = new List
{
    ("C# Basics", 300),
    ("Memory Management", 450),
    ("Advanced C#", 500)
};

int totalPages = 0;

// Use foreach loop to add pages
// Your code here

Need a hint?

Use foreach (var book in books) and inside add book.Pages to totalPages.

4

Print the total pages

Write a Console.WriteLine statement to print the text Total pages: followed by the value of totalPages using string interpolation.

C Sharp (C#)

var books = new List
{
    ("C# Basics", 300),
    ("Memory Management", 450),
    ("Advanced C#", 500)
};

int totalPages = 0;

foreach (var book in books)
{
    totalPages += book.Pages;
}

// Print the total pages
// Your code here

Need a hint?

Use Console.WriteLine($"Total pages: {totalPages}"); to print the result.