# IEEE_NEXT_UP

Elemental Module Intrinsic Function (Generic): Returns the next higher adjacent machine number. This is equivalent to the IEEE nextUp operation.

## Module

USE, INTRINSIC :: IEEE_ARITHMETIC

result = IEEE_NEXT_UP (x)

x | (Input) Must be of type REAL.

## Results

The result type and kind are the same as x. The value of the result is the least value that compares greater than x - except when x has the value NaN, the result is NaN, and when x has the value + ∞, the result is + ∞. If x is a signaling NaN, IEEE_INVALID signals; otherwise, no exception is signaled.

This is the nextUp operation as specified in the ISO/IEC/IEEE 60559:2011 standard.

## Example

The value of IEEE_NEXT_UP (HUGE (x)) is + ∞ if the value of IEEE_SUPPORT_INF (x) is .true..

Parent topic: H to I

## See Also

IEEE_ARITHMETIC Intrinsic Module
IEEE Intrinsic Modules Quick Reference Tables