Intel® Fortran Compiler 18.0 Developer Guide and Reference
Elemental Module Intrinsic Function (Generic): Returns the next representable value after X toward Y. This is equivalent to the IEEE nextafter function.
USE, INTRINSIC :: IEEE_ARITHMETIC
result = IEEE_NEXT_AFTER (x,y)
x |
(Input) Must be of type REAL. |
y |
(Input) Must be of type REAL. |
The result type and kind are the same as x. If x is equal to y, the result is x; no exception is signaled. If x is not equal to y, the result has the value of the next representable neighbor of x toward y. The neighbors of zero (of either sign) are both nonzero.
The following exceptions are signaled under certain cases:
| Exception | Signalled |
|---|---|
IEEE_OVERFLOW |
When X is finite but IEEE_NEXT_AFTER(X,Y) is infinite |
IEEE_UNDERFLOW |
When IEEE_NEXT_AFTER(X,Y) is denormalized |
IEEE_INEXACT |
In both the above cases |
The value of IEEE_NEXT_AFTER (2.0,3.0) is 2.0 + EPSILON (X).