✅ Changing variables based on player input

Random placement = new Random();
string firstSlot = "1";
string secondSlot = "2";
string thirdSlot = "3";
string fourthSlot = "4";
string fifthSlot = "5";
string sixthSlot = "6";
string seventhSlot = "7";
string eighthSlot = "8";
string ninthSlot = "9";
string turn = "Your turn, choose a slot!";

Console.WriteLine($"TIC TAC TOE!\t({turn})\n" +
    $"\n{firstSlot}\t{secondSlot}\t{thirdSlot}" +
    $"\n{fourthSlot}\t{fifthSlot}\t{sixthSlot}" +
    $"\n{seventhSlot}\t{eighthSlot}\t{eighthSlot}\n");

string input = Console.ReadLine();

// What I need to do:
// If player inputs 1, firstSlot will change to X.
// If player inputs 2, secondSlot will change to X.
// And so on...

turn = "Computer's turn, please wait!";
Thread.Sleep( 2000 );

Random placement = new Random();
string firstSlot = "1";
string secondSlot = "2";
string thirdSlot = "3";
string fourthSlot = "4";
string fifthSlot = "5";
string sixthSlot = "6";
string seventhSlot = "7";
string eighthSlot = "8";
string ninthSlot = "9";
string turn = "Your turn, choose a slot!";

Console.WriteLine($"TIC TAC TOE!\t({turn})\n" +
    $"\n{firstSlot}\t{secondSlot}\t{thirdSlot}" +
    $"\n{fourthSlot}\t{fifthSlot}\t{sixthSlot}" +
    $"\n{seventhSlot}\t{eighthSlot}\t{eighthSlot}\n");

string input = Console.ReadLine();

// What I need to do:
// If player inputs 1, firstSlot will change to X.
// If player inputs 2, secondSlot will change to X.
// And so on...

turn = "Computer's turn, please wait!";
Thread.Sleep( 2000 );

Console.WriteLine($"TIC TAC TOE!\t({turn})\n" +
    $"\n{firstSlot}\t{secondSlot}\t{thirdSlot}" +
    $"\n{fourthSlot}\t{fifthSlot}\t{sixthSlot}" +
    $"\n{seventhSlot}\t{eighthSlot}\t{eighthSlot}\n");

Console.WriteLine($"TIC TAC TOE!\t({turn})\n" +
    $"\n{firstSlot}\t{secondSlot}\t{thirdSlot}" +
    $"\n{fourthSlot}\t{fifthSlot}\t{sixthSlot}" +
    $"\n{seventhSlot}\t{eighthSlot}\t{eighthSlot}\n");

if (input == "1")

if (input == "1")

string[] cells = new string[]{"1","2","3","4","5","6","7","8","9"};

string[] cells = new string[]{"1","2","3","4","5","6","7","8","9"};

if(int.TryParse(Console.ReadLine(), out int cell)
{

Console.WriteLine($"Wow! your cell is {cell} and value in your cell is{cells[cell]}");
}

if(int.TryParse(Console.ReadLine(), out int cell)
{

Console.WriteLine($"Wow! your cell is {cell} and value in your cell is{cells[cell]}");
}

int[][] jaggedArray3 =
{
    new int[] { 1, 3, 5, 7, 9 },
    new int[] { 0, 2, 4, 6 },
    new int[] { 11, 22 }
};

int[][] jaggedArray3 =
{
    new int[] { 1, 3, 5, 7, 9 },
    new int[] { 0, 2, 4, 6 },
    new int[] { 11, 22 }
};

int[] array = new int[5]; // Creates empty array with five spots to fill in with numbers

int[] array = new int[5]; // Creates empty array with five spots to fill in with numbers

var array = new int[5]; // same as above

var array = new int[5]; // same as above

int number = "number"; // does not work

int number = "number"; // does not work

var number = "number";

var number = "number";

Console.WriteLine(number);

Console.WriteLine(number);

int[] array = new int[5];

int[] array = new int[5];

array = new int[6];

array = new int[6];

var array = new int[6];
array = new string[6];

var array = new int[6];
array = new string[6];

var numbers = new int[5];
numbers[0] = 5; // Set the first element to 5, indexes are zero based

var numbers = new int[5];
numbers[0] = 5; // Set the first element to 5, indexes are zero based

var firstNumber = numbers[0]; // Gives back the value 5

var firstNumber = numbers[0]; // Gives back the value 5

var twoByFourNumbers = new int[2][4];

var twoByFourNumbers = new int[2][4];