On Sat, Jun 18, 2011 at 10:46 AM, John Velman <velman@cox.net> wrote:

To further emphasize, I'd like to type in (or paste in) Haskell code and
have it executed on the iPad. To reiterate: Something like Hugs, or ghci
on the iPad.

Since the iPhone OS is pretty much OS X for ARM, and GHC apparently now supports cross-compilation, you can compile GHC for iOS. I guess you could cross compile Hugs with GCC. Doing so probably isn't trivial, but it should be straightforward.

I bet you could even use Xcode to make a graphical user interface to GHCi.