So a loop or an infinite loop, because true is always true, there is no-- nothing on the screen that seems to change this keyword true, so this is actually a deliberate infinite loop, but so was that thing up top to forever say hi or whatever it is you wanted to do.
因此而出现死循环,屏幕上的这些语句无论怎么运行,都无法改变它为真的事实,这就是所谓的死循环,无论你想不想要,屏幕上都会不断打印出“hi“
计算机科学课程节选 : 哈佛公开课