using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace starpatternall.cs

{

    public class Program

    {

        public static void stars(int count)

        {

            for (int t = 0; t < count; ++t)

                Console.Write("*");

        }

​

        public static void spaces(int count)

        {

            for (int t = 0; t < count; ++t)

                Console.Write(" ");

        }

        public static void Main(string[] args)

        {

            int a;

            do

            {

                Console.Write("Choose a option in b/w 1 to 7:");

                a = int.Parse(Console.ReadLine());

                switch (a)

                {

                    case 1:

                        Console.Write("Enter number of rows:");

                        var b = int.Parse(Console.ReadLine());

                        for (int row = 1; row <= b; ++row)

                        {

                            for (int col = 1; col <= row; ++col)

                            {

                                Console.Write("*");

                            }

                            Console.WriteLine();

​

                        }

                        Console.ReadLine();

                        break;

​

                    case 2:

                        Console.Write("Enter number of rows:");

                        var c = int.Parse(Console.ReadLine());

                        for (int row = c; row >= 1; --row)

                        {

                            for (int col = 1; col <= row; ++col)

                            {

                                Console.Write("*");

                            }

                            Console.WriteLine();

                        }

                        Console.ReadLine();

                        break;

​

                    case 3:

                        int n, i, k, count = 1;

                        Console.Write("Enter number of rows:");

                        n = int.Parse(Console.ReadLine());

                        count = n - 1;

                        for (k = 1; k <= n; k++)

                        {

                            for (i = 1; i <= count; i++)

                                Console.Write(" ");

                            count--;

                            for (i = 1; i <= 2 * k - 1; i++)

                                Console.Write("*");

                            Console.WriteLine();

                        }

                        count = 1;

                        for (k = 1; k <= n - 1; k++)

                        {

                            for (i = 1; i <= count; i++)

                                Console.Write(" ");

                            count++;

                            for (i = 1; i <= 2 * (n - k) - 1; i++)

                                Console.Write("*");

                            Console.WriteLine();

                        }

                        Console.ReadLine();

                        break;

​

                    case 4:

                        Console.Write("Enter number of rows:");

                        int d = int.Parse(Console.ReadLine());

                        int l, j, m;

                        for (l = 1; l <= d; l++)

                        {

                            for (j = 1; j <= d - l; j++)

                            {

                                Console.Write(" ");

                            }

                            for (m = 1; m <= l; m++)

                            {

                                Console.Write("*");

                            }

                            Console.WriteLine("");

                        }

                        Console.ReadLine();

                        break;

​

                    case 5:

                        Console.Write("Enter number of rows:");

                        int e = int.Parse(Console.ReadLine());

​

                        for (int p = 0; p < e; ++p)

                        {

                            for (int q = 0; q <= p; ++q)

                            {

                                Console.Write("*");

                            }

​

                            if (p != e - 1)

                            {

                                Console.Write(" ");

                            }

                            else

                            {

                                Console.Write(" * ");

                            }

                            for (int q = 0; q <= p; ++q)

                            {

                                Console.Write("*");

                            }

​

                            Console.WriteLine();

                        }

                        Console.ReadLine();

                        break;

​

                    case 6:

                        Console.Write("Enter no of rows:");

                        int f = int.Parse(Console.ReadLine());    //7

                        for (int x = 0; x < f; x++)

                        {

                            if (x == 0 || x == 6)

                            {

                                for (int y = 0; y < f; y++)

                                {

                                    Console.Write("*");

                                }

                                Console.WriteLine();

                            }

                            if (x >= 1 && x <= 5)

                            {

                                for (int y = 0; y < f; y++)

                                {

                                    if (y == 0 || y == 6)

                                    {

                                        Console.Write("*");

                                    }

                                    else if (y >= 1 && y <= 5)

                                    {

                                        Console.Write(" ");

                                    }

                                }

                                Console.WriteLine();

                            }

                        }

                        Console.ReadLine();

                        break;

​

                    case 7:

​

                        Console.Write("Enter no of rows:");

                        int s = int.Parse(Console.ReadLine());      //8             

                        for (int t = 0; t < s; ++t)

                        {

                            stars(t + 1);

                            spaces(s - t - 1);

                            stars(s - t + 1);

                            spaces(2 * t);

                            stars(s - t);

                            spaces(s - t - 1);

                            stars(t + 1);

                            Console.WriteLine();

                        }

                        Console.ReadLine();

                        break;

                }

            } while (a <= 7);

        }

    }

}

​