Several files and packages

Load your own functions from another file with source(), and which packages are available without installing.

Runs in Zerethon IDE · R 4.5 Official R documentation ↗

main.R

source("geometry.R")

print(area(3, 4))
print(round(pi, 3))

geometry.R

area <- function(width, height) {
  width * height
}

Output

[1] 12
[1] 3.142

Two files: main.R (the entry, run by Run) and geometry.R next to it.

source("file.R") runs the file, so its functions and variables are defined afterwards. The path is relative to the project root.
Base R and the recommended packages are available: stats, utils, MASS, lattice, Matrix, survival and the rest of the standard R installation.
install.packages() does not work: runs have no network, so CRAN packages such as dplyr or ggplot2 cannot be added.

Official references