Ocaml Error Unbound Value when using Recursion

Question

My code is very basic as I am pretty new to ocaml I am trying to call a function recursively but I am getting an unbound value error message on the name of the function

let count_help x a lst = match lst with 
    [] -> a
    | (s,i)::t -> if s = x then count_help x a+1 t else count_help x a t
;;

let count_assoc lst x =
    count_help x 0 lst
;;

The error is Unbound value count_help on the line that calls count_help inside of count_help

This code is simply suppose to count the number times an association appears for the given character x

Jeffrey Scofield · Accepted Answer · 2014-10-21 16:38:17Z

9

You need to say

let rec count_help ...

to allow the name count_help to be used recursively within its definition.

answered Oct 21, 2014 at 16:38

Jeffrey Scofield

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