double  MathRound(
   double  value      // value to be rounded
   );

#define VALUES_TOTAL 31

//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- declare variables for conversion
   double value=0;                     // real number for MathRound conversion
   int    round_value=0;               // get the result here
//--- in a loop by the number of decimal increments of a real number
   for(int i=0; i<VALUES_TOTAL; i++)
     {
      //--- increase the real number value,
      //--- get a numeric value rounded to the nearest integer
      //--- and display control values in the journal
      value+=0.1;
      round_value=(int)MathRound(NormalizeDouble(value,1));
      PrintFormat("value: %.1f, round value: %d",value,round_value);
      /*
      result:
      value: 0.1, round value: 0
      value: 0.2, round value: 0
      value: 0.3, round value: 0
      value: 0.4, round value: 0
      value: 0.5, round value: 1
      value: 0.6, round value: 1
      value: 0.7, round value: 1
      value: 0.8, round value: 1
      value: 0.9, round value: 1
      value: 1.0, round value: 1
      value: 1.1, round value: 1
      value: 1.2, round value: 1
      value: 1.3, round value: 1
      value: 1.4, round value: 1
      value: 1.5, round value: 2
      value: 1.6, round value: 2
      value: 1.7, round value: 2
      value: 1.8, round value: 2
      value: 1.9, round value: 2
      value: 2.0, round value: 2
      value: 2.1, round value: 2
      value: 2.2, round value: 2
      value: 2.3, round value: 2
      value: 2.4, round value: 2
      value: 2.5, round value: 3
      value: 2.6, round value: 3
      value: 2.7, round value: 3
      value: 2.8, round value: 3
      value: 2.9, round value: 3
      value: 3.0, round value: 3
      value: 3.1, round value: 3
      */
     }
  }