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Yes, haskell has for loops
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module Main where | |
import Control.Monad | |
import Control.Monad.IO.Class | |
import Control.Monad.Trans.State | |
main :: IO () | |
main = do | |
forLoop 0 (< 10) (+ 1) | |
forLoop :: i -> (i -> Bool) -> (i -> i) -> (i -> IO ()) -> IO () | |
forLoop init pred change run = | |
void $ flip runStateT init $ iter pred change run | |
iter :: (i -> Bool) -> (i -> i) -> (i -> IO ()) -> StateT i IO () | |
iter pred change run = do | |
i <- get | |
if pred i | |
then do | |
liftIO (run i) | |
modify change | |
iter pred change run | |
else pure () |
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