C#循环练习题九九乘法表

1.输出九九乘法表

//99乘法口诀表 :矩形
            for (int i = 1; i < 10; i++)
            {
                for (int j = 1; j <=9; j++)
                {
                    Console.Write("{0}*{1}={2}	",i,j,i*j);//占位符
                }
                Console.WriteLine();//换行
            }
            //三角形
            for (int i = 1; i < 10; i++)
            {
                for (int j = 1; j <= i; j++)
                {
                    Console.Write("{0}*{1}={2}	", i, j, i * j);//占位符
                }
                Console.WriteLine();//换行
            }

输出简单图形练习

            //输出
            ///******
            ///******
            ///******
            ///******
            for (int i = 0; i < 5; i++)
            {
                for (int j = 0; j < 8; j++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }

            ///*
            ///**
            ///***
            ///****
            ///*****
            for (int i = 0; i < 5; i++)
            {
                for (int j = 0; j <= i; j++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }

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

            ///*****
            ///*   *
            ///*   *
            ///*   *
            ///*****
            for (int i = 0; i < 5; i++)
            {
                for (int j = 0; j < 5; j++)
                {
                    if ((i !=0 && i != 4 ) && (j != 0 && j != 4))
                    {
                        Console.Write("口");
                        continue;
                    }
                    Console.Write("我");
                }
                Console.WriteLine();
            }


            ///12345
            ///1234
            ///123
            ///12
            ///1
            for (int i = 5; i >= 1; i--)
            {
                for (int j = 1; j <= i; j++)
                {
                    Console.Write(j);
                }
                Console.WriteLine();
            }