Things to know about R

Before moving on to typing in commands, you must know that R is a case-sensitive and interpreted language. 

You can choose between manually entering commands and running a set of commands from the source file as per your will. R provides a lot of built-in functions that give most functionalities to the user. As a user, you can even create user-created functions.

You can even create and manipulate objects. You might know that objects are anything that can have an assigned value. An interactive session will require all objects to be present in the memory while the execution process is running, whereas the functions can be placed in the packages that have a reference in the current program and can be accessed as and when needed.