sema-docs 1.23.0

Canonical structured documentation for Sema builtins/special forms; powers LSP hover/completion and REPL apropos
Documentation 
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---
name: "math/nan?"
module: "math"
section: "Numeric Predicates"
---

Test if a value is NaN (not a number).

```sema
(math/nan? math/nan)       ; => #t
(math/nan? 42)             ; => #f
```