# sisnan.f man page

sisnan.f

## Synopsis

### Functions/Subroutines

logical function **sisnan** (SIN)**SISNAN** tests input for NaN.

## Function/Subroutine Documentation

### logical function sisnan (real, intent(in) SIN)

**SISNAN** tests input for NaN.

**Purpose:**

SISNAN returns .TRUE. if its argument is NaN, and .FALSE. otherwise. To be replaced by the Fortran 2003 intrinsic in the future.

**Parameters:**-
*SIN*SIN is REAL Input to test for NaN.

**Author:**-
Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**June 2017

Definition at line 61 of file sisnan.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page sisnan(3) is an alias of sisnan.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK