# REPL

> R comes with a full-featured interactive command-line REPL (read-eval-print loop) built into the`R` executable. In addition to allowing quick and easy evaluation of R statements, it has a searchable history, tab-completion, many helpful keybindings, and dedicated help `?` and shell modes `;`.

This page provides examples of using REPL on the command line.

## R REPL Example

* Type "module load r" in terminal to load the R module, then on a new line type "R" to launch R
* In terminal, q() quits the R module

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## R REPL Help Pages

* Type "?" or help(function) to enter help pages within R's REPL
* For example, to ask for help with linear functions in R, use help(lm) (output shown below)

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## Resources

* [REPL Environment Help](https://www.r-project.org/help.html)