R is a free software environment for statistical computing and graphics. It compiles and runs on a wide variety of UNIX platforms, Windows and MacOS.
R language is useful to become a data scientist, as well as a computer scientist. I mention a book that points about a data science with R. A Hands-On Programming with R Write Your Own Functions and Simulations By Garrett Grolemund. It was written how to solve the logistical problems of data science. Additional, How to write our own functions and simulations with R. In a book, readers are able to learn in practical data analysis projects (Weighted Dice, Playing Cards, Slot Machine) and understand more in R. Additional, Appendix A-E will help to install/update R and R packages as well as loading Data and debugging in R code.
Garrett Grolemund maintains shiny.rstudio.com, the development center for the Shiny R package.