//条件语句

if (false) {

	console.log("is true")

	} else {

	console.log("is false")

}

//条件语句2

switch(name){

	case "123name":

		console.log("1")

	case 2:

		console.log("2")

		break;

	case 3:

		console.log("3")

	default:

		console.log("4")

}

//条件语句3

var name = "123name"; //定义变量

for (var i = name.length; i >= 0; i--) {  //name.length 获取字符串长度

	console.log("name idx:" + i)  //字符串拼接

}

//条件语句4

do{

	console.log(" while function")

}while(false)

//条件语句5

var nCount = 1

while(nCount > 0){

	console.log("print :" + nCount)

	nCount--;

}