import UIKit

/*

 Problem:
    Write a function called numberOfVowels(in string: String) that returns the count of the total number of vowels in a string.
    Example: numberOfVowels("Hello World!") // 3

 Thoughts/assumptions:
    - will need to account for capitalization.
    - do not have to worry about whitespace in this problem.

 Test cases:
    - numberOfVowels(string: Hello World) // returns 3
    - numberOfVowels(string: "JaKE COnnerlY") // returns 4
    - numberOfVowels(string: "How much wood would a woodchuck chuck, if a woodchuck could chuck wood?") // returns 21
    - numberOfVowels(string: "How much woOd woUld a wOodchuck chuck, if A woodchuck coUld chuck wood?") //returns 21

 Approach:
    - I used an if statement on same problem previously, I'll use a switch this time around
    - make sure given string is lowercased
    - loop thru characters in string and switch char
    - check if the char is a vowel in switch case
    - set a variable to count up by 1 when a vowel is found
*/

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

numberOfVowels(string: "How much woOd woUld a wOodchuck chuck, if A woodchuck coUld chuck wood?")