These files contain R code. It will also contain other instructions:
The following picture gives an example of a R script:
Functions and keywords are colored. Pressing CTRL+R with some R code selected will execute it in the console. Also, pressing F1 with the cursor on a keyword or a R function will open the R help page of the function.
The editor has an auto-completion feature which shows up after three characters.
All recognized functions which start with the letters written will show up like below:
By pressing the Tab key, we select the function and then its parameters are displayed.