//  While20.swift  Copyright (c) Kari Laitinen

//  http://www.naturalprogramming.com

//  2014-09-26  File created.
//  2015-10-17  Last modification.

//  This program demonstrates how to write a simple while loop.

var  number_to_print  =  0 

print( "\n Numbers from 0 to 20 are the following:\n") 

while  number_to_print  <= 20 
{
   print( "  "  +  String( number_to_print ), terminator: "" )
   number_to_print  += 1
}

print( "\n\n" )