It seems that 'return' is not necessary when returning a value. If
this is the case, I don't understand why 'return' is a keyword in R.
Is there a case in which I have to use 'return'?
> f<-function(x) {
+ x
+ }
> g<-function(x) {
+ return(x)
+ }
> print(f(2))
[1] 2
> print(g(2))
[1] 2
>