Sebastian Sylvan wrote:
Others have already replied with a solution, but it looks to me like
what you're "missing" is how to sequence commands, which is the whole
purpose of the "do" notation.
print_list [] = return ()
print_list (x:xs) =
do putStr x
print_list xs
The do notation is used here to sequence to IO actions (which answers
your second question), first it prints out the first character in the
string, then it calls itself recursively to print the rest of the
list.
Thanks! And yes, I'm just learning how to sequence commands/actions, so
I know I'm missing a lot.
The empty list shouldn't print an empty string, it should do nothing
(that is, just return IO () because that's the return type of
print_list)
Yeah... I just didn't know how to "do nothing" with Haskell. Thanks!
Cheers,
Daniel.
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