Returns true if is NaN.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| real(kind=wp), | intent(in) | :: | x |
pure function f_utl_is_nan(x) result(res) ! ==== Description !! Returns true if is NaN. ! ==== Declarations real(wp), intent(in) :: x logical :: res ! ==== Instructions res = ieee_is_nan(x) end function f_utl_is_nan