which forecasting model is used in forecast() in forecast package in R?

Question

I used forecast() from forecast package in R to forecast marks of a school student. I assumed a time series of marks with frequency of 4 i.e. quarterly for 4 years. The results were fairly good. Now I want to know which forecasting model is being used in the function as I have little knowledge of statistics and it is difficult for me to identify a suitable model for predicting a student's marks. Any kind of help would be appreciated. Thank you.

Answer 1

Please read the help files. Here is an excerpt from help(forecast):

The function forecast.ts makes forecasts using ets models (if the data are non-seasonal or the seasonal period is 12 or less) or stlf (if the seasonal period is 13 or more).