Lead Data Scientist Question:

At last, we have to iterate the list of files in the current working directory. Also, we need to put them together to form a data frame. Moreover, when the script encounters the first file in the file_list, then it creates the main data frame to merge everything into. This is done using the !exists conditional:

If their dataset exists, then a temp_dataset called temporary data frame will be created and added to the dataset. Moreover, we have to delete temporary data frame. That is been removed when we’re done with it using the rm(temp_dataset) command.
If dataset doesn’t exist (!exists is true), then we have to create it.