C# Fundamentals Part 2 Extras

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Introduction

Part 2 Extras includes various useful programming content that didn’t quite fit into a specific lesson. While you might not encounter some of these techniques in upcoming lessons, feel free to incorporate them into your future programs.

Switch Statements

Switch statements provide an elegant way to handle multiple conditional paths based on the value of a variable. They’re particularly useful when you need to compare the same variable to different values.

Example:

int dayOfWeek = 3;
switch (dayOfWeek)
{
    case 1:
        Console.WriteLine("Monday");
        break;
    case 2:
        Console.WriteLine("Tuesday");
        break;
    case 3:
        Console.WriteLine("Wednesday");
        break;
    // Other cases...
    default:
        Console.WriteLine("Invalid day");
        break;
}

Do While Loops

A do while loop is similar to a while loop, but it ensures the block of code executes at least once before the condition is evaluated.

string correctPassword = "Secret123";
string inputPassword;

do
{
    Console.Write("Enter password: ");
    inputPassword = Console.ReadLine();
} while (inputPassword != correctPassword);

Console.WriteLine("Access granted!");

Break and Continue Keywords

These keywords control the flow of loops. break exits the loop entirely, while continue skips the rest of the current loop iteration and proceeds with the next iteration.

// Break Example
for (int i = 0; i < 10; i++)
{
    if (i == 5)
        break;
    Console.WriteLine(i);
}

// Continue Example
for (int i = 0; i < 10; i++)
{
    if (i % 2 == 0)
        continue;
    Console.WriteLine(i);
}