You can write code in languages other than R with R Markdown, e.g.

Bash

valid=true
count=1
while [ $valid ]
do
echo $count
if [ $count -eq 5 ];
then
break
fi
((count++))
done
## 1
## 2
## 3
## 4
## 5

Python

## US$  0.00 = R$  0.00
## US$  1.00 = R$  4.29
## US$  2.00 = R$  8.59
## US$  3.00 = R$ 12.88
## US$  4.00 = R$ 17.18
## US$  5.00 = R$ 21.47
## US$  6.00 = R$ 25.76
## US$  7.00 = R$ 30.06
## US$  8.00 = R$ 34.35
## US$  9.00 = R$ 38.65
## --------------------