10.27

练习了一下用JavaScript在页面输出九九乘法表

练习：99乘法表
           <!DOCTYPE html>
           <html lang="en">
           <head>
                <meta charset="UTF-8">
                <title>99乘法表</title>
                <style>
                    td{
                        border: 1px solid;
                    }

                </style>

                <script>

                    document.write("<table align='center'>");


                    //1.完成基本的for循环嵌套，展示乘法表
                    for (var i = 1; i <= 9 ; i++) {
                        document.write("<tr>");
                        for (var j = 1; j <=i ; j++) {
                            document.write("<td>");

                            //输出 1 * 1 = 1
                            document.write(i + " * " + j + " = " + ( i*j) +"   ");

                            document.write("</td>");
                        }
                        /*//输出换行
                        document.write("<br>");*/

                        document.write("</tr>");
                    }

                    //2.完成表格嵌套
                    document.write("</table>");

                </script>
           </head>
           <body>

           </body>
           </html>