What's a real world example for using "while" loops?

Any time your program needs to keep doing something (repeat the same or a similar action) until something happens and you don’t know in advance when or if that something happens, a while loop is useful. Every programming language has some sort of while loop construct, so I’m going to give you an example in pseudocode:

// music player loop:
while (user does NOT press stop AND NOT end of playlist) {
  get the next song
  play the song
}

// user input loop
ask user a yes-or-no question
get answer
while (answer is NOT "yes" AND answer is NOT "no") {
  repeat the question // this must be a fairly stupid user
}

while your game character is level 1, she can only do 5 points damage

while you press the accelerator, you do drive

while the timer is running, the timer counter is progressing…

etc

Sorry, I can only think in game terms, but I think these would all work with while loops..