循环的嵌套-蒲公英云

循环的嵌套

依旧是个小demo

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title>循环的嵌套</title>
    </head>
    <body>
    </body>
    <script type="text/javascript">
        //1 2 3 4 5 6 7 8 9 
        for(var h=1;h<=9;h++) //外循环
        { 
            for (var i=1;i<=9;i++) //内循环
            { 
                document.write(i+"\t");
            }
            document.write("<br />")
        }
        //11111111111111111111  2222222222222222....
        document.write("<br />")
        for (var i=1;i<=9;i++) 
        { 
            for (var g=1; g<=9;g++) { 
                document.write(i+"\t");
            }
            document.write("<br />")
        }
        //1  22   333  4444.....
        document.write("<br />")
        for(var s=1;s<=9;s++)
        { 
            for(var i=1;i<=s;i++)
            { 
                document.write(s+"\t");
            }
            document.write("<br />")
        }
        //1  12  123   1234 ....
        document.write("<br />")
        for (var j=1;j<=9;j++)
        { 
            for(var i=1;i<=j;i++)
            { 
                document.write(i+"\t");
            }
            document.write("<br />");
        }
        //99乘法表
        document.write("<br /><br />");
        for (var j=1;j<=9;j++)
        { 
            for (var i=1;i<=j;i++)
            { 
                document.write(i+"*"+j+"="+(i*j)+"\t");
            }
            document.write("<br />");
        }
    </script>
</html>