JS打印倒三角

1.效果

效果.PNG

2.JavaScript代码

    <script type="text/javascript">

        function printTri(x)
        {
            //放进段落,段落居中，自然就居中了
            document.write("<p align='center'>");
            for (var i = 1; i <= x; i++)
            {
                for (var j = 1; j <= x - i + 1; j++)
                {
                    document.write(" ");
                    var icon = "\u263a";
                    document.write(" " + icon +" ");
                }
                document.write("<br>");
            }
            document.write("</p>");

        }
        printTri(10);
    </script>