using System;

​

public class poop

{

    public static void Main()

    {

        //instantiate array

        string[] ourArray = { "Macy", "Ralph", "Noodles" };

​

        Console.WriteLine("Hello, user! Here is your current array:");

​

        //loop thru each element n print them on a new line (pass in our array as argument)

        loopdeloop(ourArray);

​

        Console.WriteLine("Would you like to change an element? [y/n]");

        //make sure our user behaves.... type the right input or else

        if (Console.ReadLine() == "y")

        {

            Console.WriteLine("This is a fixed array of " + ourArray.Length + ". Select what index you would like to change!");

            Console.WriteLine("Type one of these numbers to change that element: 1, 2, 3");

​

            //take in user input

            string userInput = Console.ReadLine();

​

            //to prevent crashing: check if user input is NOT an integer (the exclamation mark) and to make sure we are in the range of our array (0-2). 

            //smarter use of parsing. TryParse takes our userInput and the out keyword makes an int providedIndex variable for us so we don't have to make the variable manually.

            //if this were to return false then it won't make the variable. bc it also returns false in that scenario, it would also skip straight to the else & the bottom.

            if (!int.TryParse(userInput, out int providedIndex) || (providedIndex <= 0 || providedIndex > 3))

            {

                Console.WriteLine("Incorrect input! Please try again:");

            }

            //otherwise, continues like normal

            else

            {

                //here's the variable TryParse made for us. we are subtracting one so we aren't out of bounds since the actual array element begins at 0

                providedIndex = providedIndex - 1;

​

                Console.WriteLine("Index received! This will change the following element: {0}. \n What would you like it to say?", ourArray[providedIndex]);

                //this isn't a sensitive integer so it doesn't matter what the user puts here.

                string providedElement = Console.ReadLine();

​

                //overwrite  old array value at the user provided index. assign the user provided element at that given index. 

                ourArray[providedIndex] = providedElement;

                Console.WriteLine("Congrats! Your new array looks like this:");

​

                //using our updated array values, use our loop to print one more time

                loopdeloop(ourArray);

            }

        }

        //else if the input is not "y"

        else

        {

            Console.WriteLine("Must type 'y' to continue. Goodbye 'til next time!");

        }

    }

​

    //loop thru each element n print them on a new line

    private static void loopdeloop(String[] providedArray)

    {

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

        {

            //this string format also shows the number of the element.

            Console.WriteLine("{0}. {1}", i + 1, providedArray[i]);

        }

    }

​

}