exampleGist.swift

//: Playground - noun: a place where people can play

import Foundation

func numberOfVowels(in string: String) -> Int {
	var numberOfVowels = 0
	for vowel in string.lowercased() {
		switch vowel {
		case "a", "e", "i", "o", "u":
			numberOfVowels = numberOfVowels + 1
		default:
			break //switch is done
		}
	}
	return numberOfVowels
}

func numberOfVowels2(in string: String) -> Int {

	let vowelArray = ["a", "e", "i", "o", "u"]
	var numberOfVowels = 0

	for letter in string.lowercased() {
		let stringVersionOfLetter = String(letter)
		if vowelArray.contains(stringVersionOfLetter) {
			numberOfVowels += 1
		}
	}

	return numberOfVowels
}


func numberOfVowels3(in string: String) {

	let vowels = CharacterSet(charactersIn: "aeiou")

//	let newString = string.replacingOccurrences(of: vowels, with: "")
	let vowelCount = string.count - newString.count
	print(vowelCount)
}



print(numberOfVowels(in: "Fee Fi Fo Fum"))
//print(numberOfVowels(in: "Hello world!"))
//print(numberOfVowels(in: "OBEY!"))
//print(numberOfVowels(in: "The lazy sheep jumped over the moon."))