mql5 "';' - open parenthesis expected" in predefined Variable Bars

[EdCortez]

I've this error

';' - open parenthesis expected in the next code:

void OnStart()
  {
//---
   for(int i = 0; i<Bars; i++){
   Print(i);
   }   
  }

The error is on line 20, where is the predefined variable