执行程序,有S=0,i=0满足条件i≤10,有S=0,i=1;满足条件i≤10,有S=1,i=2;满足条件i≤10,有S=3,i=5;满足条件i≤10,有S=8,i=26;不满足条件i≤10,退出循环,输出S的值为8.故答案为:8.