Why methods are needed in C Sharp (C#) - See It in Action

Why Methods Are Needed

📖 Scenario: Imagine you are organizing a small library. You need to keep track of books and perform tasks like adding new books and showing all books. Doing these tasks repeatedly without methods can be confusing and messy.

🎯 Goal: You will create a simple program that uses methods to add books and display them. This will show why methods help keep code clean and easy to use.

📋 What You'll Learn

Create a list to store book titles

Create a method called AddBook to add a book title to the list

Create a method called ShowBooks to print all book titles

Use these methods to add and show books

💡 Why This Matters

🌍 Real World

In real software, methods help keep code clean and organized, making it easier to build and fix programs.

💼 Career

Understanding methods is essential for any programming job because they are the building blocks of writing clear and reusable code.

1

Create a list to store book titles

Create a list called books that can hold strings representing book titles.

C Sharp (C#)

// Your code here to create the list called books

Need a hint?

Use List<string> to create a list that holds text values.

2

Create a method to add a book

Create a method called AddBook that takes a string parameter title and adds it to the books list.

C Sharp (C#)

using System;
using System.Collections.Generic;

class Program
{
    static List books = new List();

    static void AddBook(string title)
    {
        // Your code here to add title to books
    }

    static void Main()
    {
    }
}

Need a hint?

Use the Add method of the list to add the new book title.

3

Create a method to show all books

Create a method called ShowBooks that prints each book title from the books list using a foreach loop.

C Sharp (C#)

using System;
using System.Collections.Generic;

class Program
{
    static List books = new List();

    static void AddBook(string title)
    {
        books.Add(title);
    }

    static void ShowBooks()
    {
        // Your code here to print all book titles
    }

    static void Main()
    {
    }
}

Need a hint?

Use a foreach loop to go through each book and print it.

4

Use methods to add and show books

In the Main method, call AddBook three times with these exact titles: "C# Basics", "Learn Programming", "Data Structures". Then call ShowBooks to print all book titles.

C Sharp (C#)

using System;
using System.Collections.Generic;

class Program
{
    static List books = new List();

    static void AddBook(string title)
    {
        books.Add(title);
    }

    static void ShowBooks()
    {
        foreach (string book in books)
        {
            Console.WriteLine(book);
        }
    }

    static void Main()
    {
        // Your code here to add and show books
    }
}

Need a hint?

Call AddBook three times with the exact titles, then call ShowBooks.