haskell - simple help needed [solved]

drakosha · 2007-01-31 14:48:53

I started to learn haskell and the 1st thing i tried is to define a function. I tried it both in hugs and in hsci:

Prelude> square x = x * x
<interactive>:1:9: parse error on input `='

the same (more or less) happens in hugs.

I'm lost here, how do i define a function?

Thanks!

Last edited by drakosha (2007-02-01 12:56:05)

diffyQ · 2007-01-31 16:36:44

at the interpreter, you need to precede definitions with a 'let'. e.g.,

let square x = x*x

you should think of the interpreter prompt as running inside a 'do' block.

drakosha · 2007-02-01 00:25:46

10x!

Arch Linux