Sysop_fb
Programmer

--Calculate standard deviation
stddev ls = sqrt . fromIntegral . (`div` length ls) . sum $ map ((^2) . (minus . (`div` length ls) . fromIntegral . sum $ ls )) ls


--to evaluate a string as an expression - wish there was an easier way like in lisp mmmmm might look into this again at later date
--install hint and then
import Language.Haskell.Interpreter
runInterpreter $ setImports ["Prelude"] >> eval "3 + 5"

For data to exist all that you need is a means by which to represent it and a means to interpret it.