# IEEE_UNORDERED

Elemental Module Intrinsic Function (Generic): Returns whether one or more of the arguments is Not-a-Number (NaN). This is equivalent to the IEEE unordered function.

## Module

USE, INTRINSIC :: IEEE_ARITHMETIC

result = IEEE_UNORDERED (x,y)

x | (Input) Must be of type REAL.
y | (Input) Must be of type REAL.

## Results

The result type is default logical. The result has the value true if x or y is a NaN, or both are NaNs; otherwise, false.

## Example

IEEE_UNORDERED (0.0, SQRT(-2.0)) has the value true if IEEE_SUPPORT_SQRT (2.0) has the value true.

Parent topic: H to I

## See Also

IEEE_ARITHMETIC Intrinsic Module
IEEE Intrinsic Modules Quick Reference Tables