Question

C#中如何用控制台输出反倒三角小九九

Answer 1

 StringBuilder builder = new StringBuilder();
            for (int i = 0; i <= N ; i++)
            {
                builder.Clear();
                int Multipler = i;
                if (i < 1)
                {
                    builder.Append(" ");
                    Multipler = 1;
                }
                else
                {
                    builder.Append(i.ToString());
                }
                for (int j = 1; j <= N; j++)
                {
                    if (j < i)
                        builder.Append("   ");
                    else
                        builder.AppendFormat(" {0,2}", (j * Multipler));
                }
                Console.WriteLine(builder.ToString());
            }