//  Meanvalue.kt  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2020-10-30  File created.

fun main()
{
   var  number_of_integers_given  = -1
   var  mean_value                =  0.0  // The type of mean_value becomes
                                          // Double as we assign a Double value
   var  sum_of_integers           =  0

   print( "\n This program calculates the mean value of"
       +  "\n the integers you enter from the keyboard."
       +  "\n Please, start entering numbers. The program"
       +  "\n stops when you enter a zero. \n\n" )

   do
   {
      print( "   Enter an integer: " )
      val integer_from_keyboard  =  readLine()!!.toInt()

      number_of_integers_given  += 1
      sum_of_integers  =  sum_of_integers + integer_from_keyboard
   }
     while ( integer_from_keyboard  !=  0 )

   if ( number_of_integers_given  >  0 )
   {
      mean_value  =  sum_of_integers.toDouble() /
                     number_of_integers_given.toDouble()
   }

   print( String.format( "\n The mean value is: %f \n\n", mean_value ) )
}