Include code that does not run in Rpresentation Markdown

I have a .Rpres file in RStudio. I would like to include code, but not have it run (I am only showing the code to explain how it works). Is it possible to accomplish this (and ensure that it will not produce errors, because it is not running)?

Have you tried eval=FALSE in the knitr code chunk options? e.g.:

```{r eval=FALSE}
print("Don't run me")
```

{r, eval=F, echo=T} will include the R source code in the output file while it is not evaluated

Posting for anyone who may come across this like I have. I've found that for small examples (if you don't want to use chunks), you can also just use back ticks like you would with regular markdown inline, but just don't add the "r" at the beginning:

`plot(cars)`

Will print the code itself, but will not print the plot.