For




26.
decimal l1;
            string number,one1,one2,one3,one4;
            float one11, two2,k1;

         
            Console.WriteLine("first day ");
            for(int i = 1; i <6; i++)
            {
                Console.WriteLine("day" + i);
                one1 = Console.ReadLine();

                if (one1 == "16")
                {

                    one3 = one1;
                    Console.WriteLine("             ");
                    Console.WriteLine("day" +"  "+ i + "had 16 degrees");
                    Console.WriteLine("             ");



                }


            }




27. 
namespace Calculator2
{
    class Program
    {


              static void Main(string[] args)
              {
              for (int i = 0; i < 81;)
                     { 
                      i = i + 2;
                Console.WriteLine(i);
                     }

              }
    }
}



28.
namespace Calculator2
{
    class Program
    {
              static void Main(string[] args)
              {
              for (int i = 1; i < 301; i++)
             
                Math.Sqrt(i);
                Math.Round(i);
            
                Console.WriteLine(i);

              }
    }
    
    
    
    
29.
namespace Calculator2
{
    class Program
    {

        static void Main(string[] args) 
        
        {

            for (int i = 1; i < 75;) 
            {
                i = i + 3;
                Console.WriteLine(i);
            }
        }
           
           
    }
}