If seed depends of psudo random event, for example of current systime, we must use IO action.
30.12.2011, 02:47, "Steve Horne" <sh006d3...@blueyonder.co.uk>: > > BTW - why use an IO action for random number generation? There's a > perfectly good pure generator. It's probably handy to treat it > monadically to sequence the generator state/seed/whatever but random > number generation can be completely pure. > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
