challenge_3.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace ConsoleApp
{
    class Program
    {

        static int VowelCount(String vowelName)
        {
            int vowel = 0;
            char[] vowels = { 'a', 'e', 'i', 'o', 'u' };
            for (int i = 0; i < vowelName.Length; i++)
            {
                if (vowels.Contains(vowelName[i]))
                {
                    vowel++;
                }
            }
            return vowel;
        }
       static void Main(string[] args)
       {
           Console.WriteLine("Write a word:");
           string userword = Console.ReadLine().ToLower();
           int count = VowelCount(userword);
           Console.WriteLine(count);
           Console.ReadLine();
       }

    }
}