循环

闭包循环的索引值

 
 
 


   

   
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(2)do...while循环

//1.创初始化一个变量
        var j = 0;
        //2.在循环中设置一个条件表达式
 -          while(j < aLi.length){
 +          /*while(j < aLi.length){
            aLi[j].style.background = 'gold';
            //3.定义一个更新表达式，每次更新初始化变量
              j++;
   -          }
 +          }*/
 +
 +          do{
 +              aLi[j].style.background = 'gold';
 +              j++;
 +          }while(j < 0)
  。