//while循环
/*var sum1 = 0;
var i = 0;
while(i <= 10){
sum1 = sum1 + i;
i = ++;
}
alert(sum1);*/
//do-while 循环
/*var sum2 = 0;
var i = 0;
do{
sum2= sum2 + i;
i++;
}while (i<= 10)
alert(sum2);*/
//for循环 for括号里的三个i条件是固定的格式
/*var sum3 = 0;
for(var i = 0;i <= 10; i++){
sum3 = sum3 + i;
}
alert(sum3);*/
//跳转语句 里面包含if语句
//1 continue
/*var sum = 0;
for(var i = 0;i<= 10;i++){
if(i == 9)/*注意等于是两个==
{
continue;
}
sum = sum + i;
alert(i)
}alert(sum)*/
//跳过9,继续执行
//2 break
/*var sum = 0;
for(var i=0;i<=10;i++){
if(i==9){
break;
}//alert(i)
sum = sum + i;
}alert(sum)*/
//执行到8,9后面的直接跳出
