C#开发课程里的4-9编程题怎么做？

Answer 1

for (int y = 1; y <= 7; y++)
            {
                for (int x = 1; x <=y; x++)
                {
                    Console.Write(x);
                }
                Console.WriteLine();
            }

Answer 2

这么简单的问题，你有时间提问。还不如放到编辑器里面运行一下！