Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 11/07/2023
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

?isnan

Tests input for NaN.

Syntax

val = sisnan( sin )

val = disnan( din )

Include Files

  • mkl.fi

Description

This logical routine returns .TRUE. if its argument is NaN, and .FALSE. otherwise.

Input Parameters

sin

REAL for sisnan

Input to test for NaN.

din

DOUBLE PRECISION for disnan

Input to test for NaN.

Output Parameters

val

Logical. Result of the test.