Learn the required content of this unit, and conduct your research to answer the following:

What are various ways and libraries that provide similar capabilities for Importing data from CSV and text files as well as other forms of datafile such as excel file formats? $($investigate many $R$ libraries that are available beyond the content covered in class$)$

Compare and contrast the functionality of for loop, while loop, with apply functions? Provide your unique examples and show the differences by a script that your classmates can run to see the difference.