How to find index of an Array element in OCaml

Question

I am trying to find the index of an integer array element in ocaml. How to do this recursively. Example code:let a = [|2; 3; 10|];; suppose I want to return the index of 3 in the array a. Any help appreciated. I am new to OCaml programming

Answer 1

You check each of the elements recursively using an index

let rec find a x n =
if a.(n) = x then n 
else find a x (n+1);;

find a x 0;;

that will raise an exception (when n is bigger than the length of the array) in case the element is not part of the array.