超简单的for循环打印九九乘法表代码

<script>
 // 九九乘法表

        document.write("<table border='' cellspacing='0' style='border:0'>");

        // 表格的样式

        var i,j;

        for (i = 1; i <= 9; i++) {

            document.write("<tr>");

            // 循环九行

            for (j = 1; j <= 9; j++) {

                // 嵌套每行九列

                if (j <= i) {

                    // 第一行一列，第二行二列....

                    document.write("<td>" + j + "*" + i + "=" + i * j + "</td>");

                } else {

                    document.write("&ensp;");

                    // 删除重复的部分

                }

            }

            document.write("</tr>");

        }

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

        document.write("-------------------------------------------------------------------------------------------------<br>");

</script>