LambdaSchool

Challenge1

func numberOfVowels(in string: String) -> Int {
  var numberOfVowels: Int = 0
  for x in string {
    if x == "a" || x == "e" || x == "i" || x == "o" || x == "u" {
      numberOfVowels += 1
    }
  }
  return numberOfVowels
}