Tutorial 5 : “While” Loop

//+------------------------------------------------------------------+
//|                                                    tutorial5.mq4 |
//|                        Copyright 2020, MetaQuotes Software Corp. |
//|                                            https://triantoadi.com |
//+------------------------------------------------------------------+
#property copyright "Copyright 2020, MetaQuotes Software Corp."
#property link      "https://triantoadi.com"
#property version   "1.00"
#property strict
//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
   {
   Alert("Mulai");
   
   int counter = 1;
   
   while(counter < 5)
      {
      Alert(counter);
      counter = counter + 1;
      }
    Alert("Loop Berakhir !");
   }