for循环练习

 <script>

          

 

         //1.求1-100之间所有数的平均值 

         var sum = 0;

         var average = 0;

         for(var i = 1; i <= 100; i++){

             sum = sum + i;

         }

         average = sum / 100;

         console.log(average);

 

         //2.求1-100之间的奇数和偶数的和  

         var even = 0;

         var odd = 0;

         for(var i = 1; i <= 100; i++){

             if(i % 2 == 0){

                 even = even + i;

             }else{

                 odd = odd + i;

             }

         }

         console.log('1-100之间所有的偶数和为：'+even);

         console.log('1-100之间所有的奇数和为：'+odd);

     </script>