//  ForeachDemo.kt  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2020-10-30  File created.

//  This program demonstrates the use of for-in loop, which is like
//  a foreach loop in some other programming languages.

fun main()
{
   val  array_of_integers  =  intArrayOf( 33, 444, 55, 6, 777 )

   val  array_of_strings  =  arrayOf<String>( "January", "February", "March" )

   print( "\n\n array_of_integers printed using an index variable:\n" )

   for ( integer_index  in  0 .. array_of_integers.size - 1 )
   {
      print( "  " + array_of_integers[ integer_index ] )
   }

   print( "\n\n array_of_integers printed with a proper for-in loop:\n" )

   for ( integer_to_print in array_of_integers )
   {
      print( "  " + integer_to_print )
   }

   print( "\n\n array_of_strings printed with an index variable:\n" )

   for ( string_index  in  0 .. array_of_strings.size - 1 )
   {
      print( "  "  +  array_of_strings[ string_index ] )
   }

   print( "\n\n array_of_strings printed with a proper for-in loop:\n" )

   for ( string_to_print in array_of_strings )
   {
      print( "  "  +  string_to_print )
   }

   print( "\n\n array_of_strings printed with a forEach() call :\n" )

   array_of_strings.forEach(
   {
      print( "  "  +  it )  // 'it' is a special identifier in Kotlin.
   } )

   print( "\n\n\n" )
   
   /*

   //  The following would work as well:
   
   array_of_strings.forEach{
      print( "  "  +  it )
   } 

   //  But setting the left brace as follows is not acceptable:

   array_of_strings.forEach
   {
      print( "  "  +  it )
   } 
   

   */
   
}