In binary:
      ASCII character (string): 0011 0101
      UTF-8 unicode (string):   0011 0101
      Unsigned decimal(16):     0000 0000 0000 0101
      Unsigned decimal(32):     0000 0000 0000 0000 0000 0000 0000 0101
      Floating Point (float):   0100 0000 1010 0000 0000 0000 0000 0000
      Double (double):          0100 0000 0001 0100 0000 0000 0000 0000
                                0000 0000 0000 0000 0000 0000 0000 0000
      

      This is why, in C#, a conversion must take place. Note that in C++ and 
      some other languages, the conversion is implicit.
      
      int i;
      double d;
      string s;

      // input the number
      Console.Write( "Enter a number: " );    
      s = Console.ReadLine( );
      i = Convert.ToInt32( s );
      d = Convert.ToDouble( s );

      // output the number
      Console.WriteLine( s );
      Console.WriteLine( i.ToString( ) );
      Console.WriteLine( d.ToString( ) );
      
      or of course...      
                  i = Convert.ToInt32( Console.ReadLine() );
                  d = Convert.ToDouble( Console.ReadLine() );