```
#' @title squares number(s)
#' @description
#' based on a fortran subroutine or calculated in R, depending in type
#' @param x single number or even a vector containing numerical values
#' @param type character value: language which shall be used for calculating: 'Fortran' or 'R'
#' @examples
#' require(microbenchmark)
#' microbenchmark(square(1:1000, type = "Fortran"), square(1:1000, type = "R"))
#' @useDynLib testFortran
#' @export
square <- function(x, type = c("Fortran", "R")) {
type <- match.arg(type)
stopifnot(is.numeric(x))
if(type == "Fortran") {
out <- .Fortran(
"square",
x = as.double(x),
n = length(x),
PACKAGE = "testFortran"
)$x
}
if(type == "R") {
out <- x*x
}
return(out)
}
```

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.