R Script File
R Script file is a file with extension “.R” that contains a program (a set of commands). Rscript is an R Interpreter which helps in the execution of R commands present in the script file.
In this tutorial, we will learn basic syntax required to write R Script File and execute R Script File with Rscript command in Terminal / Console.
R Script File – Example
The following is a simple R Script file named “Example.R” that has instructions to print “Hello World!” to the console. Use R Studio or any text editor to create a file named Example.R in your PC / Mac.
# R program to print Hello World aString = "Hello World!" print ( aString)
Following is a detailed explanation for each line in the above script file.
- First line is a comment and a comment in R programming language starts with # (hash) symbol. There are only single line comments supported in R language, though there is a work around for multiple line comments.
- Second line is an assignment of value “Hello World!” to the variable
- In the third line, we are printing the value of variable
aStringto the standard console output.
Run R Script File
R language provides an R Interpreter. It can be invoked using the command Rscript in the terminal. To run an R script file Example.R in the Terminal command prompt, use the following syntax.
$ Rscript Example.R
The syntax remains same for Windows/MacOS/Linux/Ubuntu.
Open a Terminal from the location of Example.R and run the following command in the Terminal.
$ Rscript HelloWorld.R
R executes the script file Example.R and the following output is printed to the console output.
 "Hello World!"
In this R Tutorial, we learned basic syntax required to write R Script File and execute R Script File with Rscript.