:sig
function is_nan(value : f32) bool
function is_nan(value : f64) bool

:params
value : the floating-point value

:returns
`true` or `false`.

:content
`is_nan()` tests if `value` is NaN.

The compiler emits a direct lib call.

:example capy render
print(is_nan(0.0), "\n")

:see-group
math
