nosiema, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            int a = 123456, oddCounter = 0, evenCounter = 0;
            do
            {
                int m = a % 10;
                switch(m % 2)
                {
                    case 0:
                        evenCounter++;
                        break;
            
                    default: // case 1:
                        oddCounter++;
                        break;
                }
                //bool isEven = m % 2 == 0;
            }while( ( a /= 10 ) != 0 );
            Console.WriteLine("Even numbers ammount is {0}", evenCounter);
            Console.WriteLine("Odd numbers ammount is {0}", evenCounter);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,11 sec, cpu time: 0,12 sec, average memory usage: 11 Mb, average nr of threads: 3