How to check for NaN in Scheme?

Question

Also is there a place where I could look up all the floating points ops in Scheme?

Answer 1

Have you read the RnRs document for whatever version of scheme you're using? Other than that you could try looking at your implementations manual for things that aren't in the language spec.

Answer 2

I think this explains it well.

Answer 3

In most programming languages, you can determine NaN values by comparing a value with itself.

(define (nan? x)
  (not (= x x)))