Hello World in Brainfk

This weekend, in a fit of boredom I thought I'd give Brainf**k a go. One of the most popular and recognized esoteric programming languages, I can't think of any real advantages that Brainf**k provides (If you can, let me know :) ). Richie Cotton has very kindly coded an interpreter for Brainf**k; you may find the code for the same here. I use his interpreter to write a HelloWorld program and a program that prints the integers 0 to 9.

if(!exists("foo", mode="function")) source("brainfuck.R")

Here goes the HelloWorld code:

helloworld<-"
+++++ +++++[>+++++ +++++<-] >++++.---.+++++ ++..+++.>>>+++[>+++++ +++++<-]
>++.<<<<+++++ +++.----- ---.+++.----- -.----- ---.>>+++++ +++++.

"
bfi <- fuckbrain()
bfi$interpret(helloworld)

## hello world

And this beauty prints the integers 0 to 9:

print0to9 <- "++++[>+++++ +++++<-]+++++ +++++
>+++++ ++<[>+.<-]
"
bfi <- fuckbrain()
bfi$interpret(print0to9)

## 0123456789

In keeping with the spirit of these languages, I haven't included any comments to help understand the code. If you need more understandable code, well-commented Brainf**k HelloWorld codes are present dime a dozen online. This Stackoverflow post gives a very engaging introduction to the language.
The codes here are just something I threw together to see if I could get the hang of this language and are neither optimised for length nor efficiency. I would love to know how they can be improved on both counts, if you have any thoughts.

*Resources: *
1. http://4dpiecharts.com/2013/04/24/a-brainfuck-interpreter-for-r/
2. http://stackoverflow.com/questions/16836860/how-does-the-brainfuck-hello-world-actually-work
3. http://en.wikipedia.org/wiki/Brainfuck