using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int [] digits = {1,2,3};

        for(int i= digits.Length -1 ; i > 0 ; i --)

        {

            if(digits[i] == 9){

                digits[i] = 0;

            }

                else

            {

                digits[i]++;

                Console.Write(digits);

                break;

            }

​

        }

        int[] firstOne = new int[] { 1 };

        Console.Write(firstOne.Concat(digits).ToArray());

        string newnum = (String.Join("",digits));

        int result = (Convert.ToInt32(newnum) + 1);

        ///int to array in C#

        string numberString = result.ToString();

​

        // Convert each character in the string to an integer and store in an array

        int[] digitArray = numberString.Select(c => int.Parse(c.ToString())).ToArray();

​

        Console.WriteLine(String.Join("",digitArray));

        // Print the elements of the array

        Console.WriteLine("Digits in the array:");

        foreach (int digit in digitArray)

        {

            Console.WriteLine(digit);

        }

​

        //Console.Write(result.ToString().ToCharArray());

        ///string to array

        // Sample string

        string inputString = "Hello";

​

        // Convert the string to an array of characters

        char[] charArray = inputString.ToCharArray();

​

        // Print the elements of the array

        Console.WriteLine("Characters in the array:");

        foreach (char character in charArray)

        {

            Console.WriteLine(character);

        }

        // Sample string

        string inputString1 = "Hello";

​

        // Convert the string to an array of strings (each string represents a single character)

        string[] stringArray = inputString1.Select(c => c.ToString()).ToArray();

​

        // Print the elements of the array

        Console.WriteLine("Strings in the array:");

        foreach (string str in stringArray)

        {

            Console.WriteLine(str);

        }

    }

}