求和 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
    </head>
    <body>
       <script>
           var sum=0;
           for(var i=1;i<=99;i++){
               if(i%2==1){
                   sum=sum+i;
               }
           }
           alert(sum);
       </script>
       
       <script>
           var num=0;
           for(var j=1;j<=100;j++){
               if(j%2==0){
                   num+=j;               
               }
           }
           document.write(num);
       </script>
    </body>
</html>

 

posted @ 2019-03-07 20:55  芯-觞  阅读(99)  评论(0)    收藏  举报