I was trying to be clever about not using ;; and minimizing my use of ; in
files, and I've gone off the deep end...

Why is this wrong, and how do I fix it?:

let pi = 3.14159
let pi2 = 2.0 *. pi

let normr r =
  let x = mod_float r pi2 in
  if x > 0.0 then
    if x > pi then
      -.pi2 +. x
    else
      x
  else if x < 0.0 then
    if x < -.pi then  (* <------ here *)
      pi2 +. x
    else
      x

File "fbot.ml", line 118, characters 4-52:
This expression has type float but is here used with type unit

I want normr to be float -> float


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