RStudio: Open-source development environment for the coding language R. It offers a range of features such as debugging and code completion.

Creating brand-new notebooks is unintuitive but still a long way behind RStudio in terms of the entire feel to it.
As you can plainly see, the output of mode() and typeof() is basically the same but typeof() does differ in some instances and is based on the storage mode.
So numeric types could be stored in memory in different ways, with doubles taking on more memory than an integer, for example.