Greetings, Absolutely brand new to Haskell. Taking ghci v7.10.2 out for a spin, and I find I get inconsistent return values for succ n: ghci> succ 3.14 4.1400000000000001 for example instead of the expected 4.14 succ 2.14 and 4.14 give the expected results. but succ 2.14 returns 2.1399999999999997. This anomalous behavior runs through the range of n.nn; in the n.01 range, for example, 16.01 and 63.01 return wonky results per above. I tested this on Windows and Linux (various flavors) and I get the same results there and in the interactive test code space on haskell.org. I'm not familiar enough with the language, yet, to go debugging this on my own, but it would seem to be at least a problem with how succ is implemented, if not how values are handled in general.....which could potentially be bad if you were trying to do anything requiring precise calculations....