C# While Loop Quiz and Flashcards: Practice Examples

Study Notes

While Loop Examples

The while loop is a fundamental control flow statement in C# that allows code to be executed repeatedly while a certain condition is true. Here are some examples of using while loops:

Basic Example

Initialize a variable i with a value of 0.
The loop continues to execute as long as i is less than 5.
In each iteration, i is incremented by 1.

int i = 0;
while (i &lt; 5)
{
    Console.WriteLine(i);
    i++;
}

Reading User Input

Prompt the user to enter their name.
Continue to prompt the user until they enter a non-empty string.

string name;
while (true)
{
    Console.Write("Enter your name: ");
    name = Console.ReadLine();
    if (!string.IsNullOrWhiteSpace(name))
    {
        break;
    }
    Console.WriteLine("Please enter a valid name.");
}

Simulating a Timer

Initialize a variable seconds with a value of 10.
The loop continues to execute as long as seconds is greater than 0.
In each iteration, seconds is decremented by 1.

int seconds = 10;
while (seconds &gt; 0)
{
    Console.WriteLine($"Time remaining: {seconds} seconds");
    seconds--;
    System.Threading.Thread.Sleep(1000); // wait for 1 second
}
Console.WriteLine("Time's up!");

While Loop Examples

Basic Example

Initialize a variable i with a value of 0, and the loop continues to execute as long as i is less than 5.
In each iteration, i is incremented by 1, and the current value of i is printed to the console.

Reading User Input

Continuously prompt the user to enter their name until a non-empty string is entered.
If an empty string is entered, the user is prompted again, and an error message is displayed.

Simulating a Timer

Initialize a variable seconds with a value of 10, and the loop continues to execute as long as seconds is greater than 0.
In each iteration, seconds is decremented by 1, and the remaining time is printed to the console.
The program waits for 1 second between each iteration using System.Threading.Thread.Sleep(1000).
When seconds reaches 0, a "Time's up!" message is displayed.