How to increment a variable in functional programming?

user_172754 0
Viewed 27614

How do you increment a variable in a functional programming language?

For example, I want to do:

main :: IO ()
main = do
    let i = 0
    i = i + 1
    print i

Expected output:

1
functional-programming haskell
4 Answers

Note: This is not an ideal answer but hey, sometimes it might be a little good to give anything at all.

A simple function to increase the variable would suffice.

For example:

incVal :: Integer -> Integer
incVal x = x + 1

main::IO()
main = do
   let i  = 1
   print (incVal i)

Or even an anonymous function to do it.

user_107327270
Related