/* 

"Write a program to find the sum of the series 1 +11 + 111 + 1111 + .. n terms.

Prompt the user enter the number of their terms of the series.  Display the series and the sum of the series on the screen.

​

Use a for loop.

​

​

Example

Input the number of terms : 6

This will be the sequence:  1, 11, 111, 1111, 11111,111111

The sum will be:                 1+11+111+1111+11111+111111 = 123456"

*/

// Katie Vo - Period 3

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Input the number of terms");

        int num = Convert.ToInt16(Console.ReadLine());

        int multiplier = 1; 

        int start = 1;

        int total = 0;

        int prod = start;           

        /*

        for (int i = 0; i < num; i++){

            if (i != 0){

                prod += multiplier * start;

            }

            total += prod;

            multiplier *= 10;

            if (i == 0){

                Console.Write ("This will be the sequence: ");

            }

            if (i != num - 1){

                Console.Write($"{prod}+");

            }

            else {

                Console.Write($"{prod} = {total}");

            }

        }

        */

        for (int j = 0; j < 2; j++){

            for (int i = 0; i < num; i++){

                if (j == 0){

                    if (i != 0){

                    prod += multiplier * start;

                    }

                    multiplier *= 10;

                    if (i == 0){

                        Console.Write ("This will be the sequence: ");

                    }

                    if (i == num - 1){

                        Console.Write($"{prod} ");

                        Console.WriteLine();

                    }

                    else {

                        Console.Write($"{prod}, ");

                    }

                }

                if (j == 1){

                    if (i != 0){

                        prod += start * multiplier;

                        //Console.WriteLine("prod: " + prod);

                    }

                    else {

                        multiplier = 1;

                        prod = start;

                    }

                    multiplier *= 10;

                    total += prod;

                    //Console.WriteLine("multiplier: " + multiplier);

                    if (i == 0){

                        Console.Write ("The sum will be:  ");

                    }

                    if (i != num - 1){

                        Console.Write($"{prod}+");

                    }

                    else {

                        Console.Write($"{prod} = {total}");

                    }

                }

​

            }

        }

    }

}