using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Array HW");

        Console.WriteLine("");

        Console.WriteLine("Question 1");

        string[] footballers = new string[5];

        footballers[0] = "Messi";

        footballers[1] = "Ronaldo";

        footballers[2] = "Pele";

        footballers[3] = "Maradona";

        footballers[4] = "Mbappe";

        Console.WriteLine("");

        Console.WriteLine("Question 2");

        Console.WriteLine("");

        String[] marvel = new string[5];

        marvel[0] = "Iron Man";

        marvel[1] = "Hulk";

        marvel[2] = "Thor";

        marvel[3] = "Captain America";

        marvel[4] = "Spider Man";

        Console.WriteLine("marvel:");

        for (int i = 0; i < marvel.Length; i++)

        {

            Console.WriteLine(marvel[i]);

        }

​

        Console.WriteLine("");

        Console.WriteLine("Question 3");

        Console.WriteLine("");

        char[] vowels = {'a', 'e', 'i', 'o', 'u'};

        Console.WriteLine("");

        Console.WriteLine("Question 4");

        Console.WriteLine("");

        int[] values1 = {45, 32, 56, 67, 12, 40, 99, 78};

        if (values1.Length >= 3)

        {

            int thirdValue = values1[2];

            Console.WriteLine("The third value is: " + thirdValue);

        }

        else

        {

            Console.WriteLine("The array does not have at least 3 elements.");

        }

​

        Console.WriteLine("");

        Console.WriteLine("Question 5");

        Console.WriteLine("");

        int[] values = {45, 32, 56, 67, 12, 40, 99, 78};

        int numberOfElements = values.Length;

        Console.WriteLine("The number of elements in the array is: " + numberOfElements);

    }

}

        Console.WriteLine("");

        Console.WriteLine("Question 6");

        Console.WriteLine("");

​

         int[] numbers = new int[5];

​

        Console.WriteLine("Enter 5 integers, one at a time:");

​

        for (int i = 0; i < 5; i++)

        {

            Console.Write("Enter integer {i + 1}: ");

            if (int.TryParse(Console.ReadLine(), out int userInput))

            {

                numbers[i] = userInput;

            }

            else

            {

                Console.WriteLine("Invalid input. Please enter an integer.");

                i--; 

            }

        }

​

        Console.WriteLine("");

        Console.WriteLine("Question 7");

        Console.WriteLine("");

        Console.WriteLine("Original integers:");

​

        for (int i = 0; i < 5; i++)

        {

            Console.WriteLine(numbers[i]);

        }

​

        Console.Write("Enter a new value for position 3  ");

        if (int.TryParse(Console.ReadLine(), out int newValue))

        {

            if (newValue >= 0 && newValue < numbers.Length)

            {

                numbers[2] = newValue;

                Console.WriteLine("Value at position 3 has been updated.");

            }

            else

            {

                Console.WriteLine("Invalid position. Position must be between 0 and 4.");

            }

        }

        else

        {

            Console.WriteLine("Invalid input. Please enter an integer.");

        }

​

        Console.WriteLine("Updated integers:");

​

        for (int i = 0; i < 5; i++)

        {

            Console.WriteLine(numbers[i]);

        }

​

        Console.WriteLine("");

        Console.WriteLine("Question 8");

        Console.WriteLine("");

​

        int[] numbers = new int[5];

​

        Console.WriteLine("Enter 5 positive integers, one at a time:");

​

        for (int i = 0; i < 5; i++)

        {

            Console.Write("Enter integer {i + 1}: ");

            if (int.TryParse(Console.ReadLine(), out int userInput) && userInput > 0)

            {

                numbers[i] = userInput;

            }

            else

            {

                Console.WriteLine("Invalid input. Please enter a positive integer.");

                i--; 

            }

        }

​

        int total = 0;

​

        foreach (int number in numbers)

        {

            total += number;

        }

​

        Console.WriteLine("The total of the 5 positive integers is: {total}");

​

        Console.WriteLine("");

        Console.WriteLine("Question 9");

        Console.WriteLine("");

​

        int[] numbers = new int[3];

​

        Console.WriteLine("Enter 3 integers, one at a time:");

​

        for (int i = 0; i < 3; i++)

        {

            Console.Write($"Enter integer {i + 1}: ");

            if (int.TryParse(Console.ReadLine(), out int userInput))

            {

                numbers[i] = userInput;

            }

            else

            {

                Console.WriteLine("Invalid input. Please enter an integer.");

                i--; 

            }

        }

​

        Array.Sort(numbers);

​

        Console.WriteLine("Numbers in ascending order:");

​

        foreach (int number in numbers)

        {

            Console.WriteLine(number);

        }

​

        Console.WriteLine("");

        Console.WriteLine("Question 10");

        Console.WriteLine("");

​

         int[] numbers = new int[10];

​

        Console.WriteLine("Enter 10 integers between 1 and 30:");

​

        for (int i = 0; i < 10; i++)

        {

            bool validInput = false;

​

            while (!validInput)

            {

                Console.Write($"Enter integer {i + 1}: ");

                if (int.TryParse(Console.ReadLine(), out int userInput) && userInput >= 1 && userInput <= 30)

                {

                    numbers[i] = userInput;

                    validInput = true;

                }

                else

                {

                    Console.WriteLine("Invalid input. Please enter an integer between 1 and 30.");

                }

            }

        }

​

        Console.WriteLine("You entered the following integers:");

        foreach (int number in numbers)

        {

            Console.WriteLine(number);

        }

​

​

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