haskell - function defintion inside GHCi -

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is possible write multi-line function definitions type-signature inside ghci (as write in source file)?

i've tried far this:

prelude> :{ prelude| let f :: int -> int; prelude| f = + 1 prelude| :}  <interactive>:9:1: parse error on input ‘f’

but didn't work... there else try? thx in advance.

mind indentation:

prelude> :{ prelude| let f :: int -> int prelude|     f = + 1 prelude| :} prelude> :t f f :: int -> int prelude> f 1 2

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