100 Days of SwiftUI 04

for _ in 1 ..< 5 {
    print("我来了！")
}
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var number = 20
while number >= 1 {
  print(number)
  number -= 1
}
print("准备好了没？我来啦！")

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var num = 1
repeat{
    print(num)
    num += 1
} while num <= 5

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repeat{
    print("false!，这个只能运行一次")
}while false
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while false {
    print("这个print永远不会运行")
}