【Swift 60秒】32 - Exiting loops

0x00 Lesson

You can exit a loop at any time using the ​​break​​​ keyword. To try this out, let’s start with a regular ​​while​​ loop that counts down for a rocket launch:

var countdown = 10
while countdown >= 0 {
  print (countdown)
  countdown -= 1
}
print("Blast off!")

In this case, the astronaut in command gets bored part-way through the countdown and decides to skip the remainder and launch straight away:

while countdown >= 0 {
  print(countdown)
  if countdown == 4 {
    print("I'm bored. Let's go now!")
    break
  }
  countdown -= 1
}

With that change, as soon as ​​countDown​​ reaches 4 the astronaut’s message will be printed, and the rest of the loop gets skipped

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