Swift version: 5.6
The Fizz Buzz test is a simple coding test used in some coding interviews. It’s not designed to be hard, in fact quite the opposite – it’s designed to be easy enough that most folks can solve it without feeling too pressured.
To pass the test you must write a function that accepts an integer and returns a string. Which string to return depends on the input number:
There are lots of ways this can be solved in Swift, but I think one of the most interesting is to use tuples like this:
func fizzbuzz(number: Int) -> String {
switch (number % 3 == 0, number % 5 == 0) {
case (true, false):
return "Fizz"
case (false, true):
return "Buzz"
case (true, true):
return "FizzBuzz"
case (false, false):
return String(number)
}
}
print(fizzbuzz(number: 15))
This approach breaks down a large input space – any number – into simple combinations of true and false, and we then use tuple pattern matching in the case statements to select the correct output.
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Available from iOS 8.0
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
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