Programming in Swift: Fundamentals

Oct 19 2021 Swift 5.5, iOS 15, Xcode 13

Part 3: Control Flow

18. While Loops

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Previous episode: 17. Introduction Next episode: 19. Challenge: While Loops

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Update Notes: The student materials have been reviewed and are updated as of October 2021.

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What if you had to write some Swift code to print out a string 100 times? It would be tedious to write 100 print statements, but it would also violate the “Don’t Repeat Yourself” rule 99 times.

var i = 1
while i < 10
while i < 10 {

}
while i < 10 {
  print(i)
}
while i < 10 {
  print(i)
  i += 1
}
print("Counting up again")
i = 1
repeat {

}
repeat {
  print(i)
  i += 1
} 
var i = 10

i = 10