For - box, C# - rextester

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.

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 halfway = 25;
                
          
            
              for (int a = 1; a != 50; a++)
            {
                Console.Write(a);
                
                if (a == halfway)
                {
                   Console.Write("  HALFWAY ");
                 
                }
                        
            }
            
              for (int b = 1; b != 50; b++)
            {
                Console.WriteLine(b);
                  
                if (b == halfway)
                {
                   Console.WriteLine(" HALFWAY "); 
                }
         if (b == 49)
         {
             for (int c = 1; c != 50; c++)
            {
                Console.Write(c);
                
                if (c == halfway)
                {
                   Console.Write("  HALFWAY ");
                 
                }
            }        
             
            
            }
            
        }
    
        
    }
}

}

Show compiler warnings [ + ] Show input
Compilation time: 0.31 sec, absolute running time: 0.19 sec, cpu time: 0.19 sec, average memory usage: 16 Mb, average nr of threads: 4