VowelsCount

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

namespace VowelsCount
{
    class Program
    {

        static void Main()
        {
            PrintVowelsCount();
        }
        public static void PrintVowelsCount()
        {
            string inputString = Console.ReadLine().ToLower();
            int vowelCounts = 0;

            for (int i = 0; i < inputString.Length; i++)
            {
                bool isVowel = (char)inputString[i] == 97 || (char)inputString[i] == 101 || (char)inputString[i] == 105 || (char)inputString[i] == 111 || (char)inputString[i] == 117;

                if(isVowel)
                {
                    vowelCounts += 1;
                }
            }
            Console.WriteLine(vowelCounts);
        }
    }
}