用C#代碼在控制臺上打印圖案

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1; i <= 5; i++) {

                for (int k = 5; k >= i; k--) {
                    Console.Write(" ");
                }
                for (int j = 1; j <= i; j++) {
                    Console.Write("*");
                }
                for (int h = 1; h < i; h++) {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            for (int i = 4; i >=0; i--)
            {

                for (int k = 6; k>i; k--)
                {
                    Console.Write(" ");
                }
                for (int j = 1; j <= i; j++)
                {
                    Console.Write("*");
                }
                for (int h = 1; h < i; h++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }
    }
}
運行結果是這樣的：

     *
    ***
   *****
  *******
 *********
  *******
   *****
    ***
     *

總結：代碼不夠緊湊、也不夠專業，循環太多，浪費時間，尋找更好的解決方案。