C# Control Structures

Conditionals in C#
Conditionals are used to perform different actions based on different conditions.

Example: Using if-else Statements

code

using System;

namespace NationalParks
{
    class ParkStatus
    {
        static void Main(string[] args)
        {
            string parkName = "Yosemite National Park";
            bool isOpen = false;

            if (isOpen)
            {
                Console.WriteLine($"{parkName} is open to visitors.");
            }
            else
            {
                Console.WriteLine($"{parkName} is currently closed.");
            }
        }
    }
}

Example: Using switch Statements

code

using System;

namespace NationalParks
{
    class ParkSwitch
    {
        static void Main(string[] args)
        {
            string parkCode = "YNP"; // Yosemite National Park

            switch (parkCode)
            {
                case "YNP":
                    Console.WriteLine("Yosemite National Park");
                    break;
                case "ZNP":
                    Console.WriteLine("Zion National Park");
                    break;
                case "GNP":
                    Console.WriteLine("Glacier National Park");
                    break;
                default:
                    Console.WriteLine("Unknown park code");
                    break;
            }
        }
    }
}

xplanation:

if-else statement evaluates a boolean condition and executes corresponding code blocks.
switch statement selects a code block to execute based on the value of a variable.
Loops
Loops in C#
Loops are used to execute a block of code repeatedly.

Example: Using for Loop

code

using System;

namespace NationalParks
{
    class ParkLoop
    {
        static void Main(string[] args)
        {
            string[] parks = { "Yellowstone", "Yosemite", "Zion", "Grand Canyon" };

            for (int i = 0; i < parks.Length; i++)
            {
                Console.WriteLine(parks[i]);
            }
        }
    }
}

Example: Using while Loop

code

using System;

namespace NationalParks
{
    class ParkWhile
    {
        static void Main(string[] args)
        {
            string[] parks = { "Yellowstone", "Yosemite", "Zion", "Grand Canyon" };
            int index = 0;

            while (index < parks.Length)
            {
                Console.WriteLine(parks[index]);
                index++;
            }
        }
    }
}

Example: Using do-while Loop

code

using System;

namespace NationalParks
{
    class ParkDoWhile
    {
        static void Main(string[] args)
        {
            string[] parks = { "Yellowstone", "Yosemite", "Zion", "Grand Canyon" };
            int index = 0;

            do
            {
                Console.WriteLine(parks[index]);
                index++;
            } while (index < parks.Length);
        }
    }
}

Example: Using foreach Loop

code

using System;

namespace NationalParks
{
    class ParkForeach
    {
        static void Main(string[] args)
        {
            string[] parks = { "Yellowstone", "Yosemite", "Zion", "Grand Canyon" };

            foreach (var park in parks)
            {
                Console.WriteLine(park);
            }
        }
    }
}

Explanation:

for loop iterates a specific number of times.
while loop continues as long as the condition is true.
do-while loop executes at least once and continues as long as the condition is true.
foreach loop iterates through each element in a collection.