js笔记_流程控制

if判断

var age = 1;
if (age>3){
alterr("haha");
}else if{age<5){
alert("kuwa");
}else{
alert("kuwa");
}

while循环，避免程序死循环

while(age<100){
age = age + 1;
console.log(age)
}

do{
age = age + 1;
console.log(age)
}while(age<100)

foe循环
for(let i = 0; i<100; i++){
console.log(i);
}

forEach循环
//函数
age.forEach(function (value){
console.log(value)
})

for...in