``` function bubble( ary){ let temp=null; //外层循环I控制比较的轮数 for(let i=0;i<ary.length-1;i++){ //里层循环控制每-轮比较的次数 for(let j=0;j<ary.length-1-i;j++){ if(ary[j]>ary[j+1]){ // 当前项大于后一项 temp=ary[j]; ary[j]=ary[j+1] ; ary [j+1] =temp; } } } return ary ; } let ary = [12,8,24,16,1];ary=bubble(ary); console.log(ary); ```