Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 3/22/2024
Public

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Document Table of Contents

IEEE_IS_FINITE

Elemental Module Intrinsic Function (Generic): Returns whether an IEEE value is finite.

Module

USE, INTRINSIC :: IEEE_ARITHMETIC

result = IEEE_IS_FINITE (x)

x

(Input) Must be of type REAL.

Results

The result type is default logical. The result has the value true if the value of x is finite; otherwise, false.

An IEEE value is finite if IEEE_CLASS(x) has one of the following values:

IEEE_POSITIVE_NORMAL

IEEE_NEGATIVE_DENORMAL

IEEE_NEGATIVE_NORMAL

IEEE_POSITIVE_ZERO

IEEE_POSITIVE_DENORMAL

IEEE_NEGATIVE_ZERO

Example

IEEE_IS_FINITE (-2.0) has the value true.