nag_is_nan (x07abc) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual

NAG Library Function Document

nag_is_nan (x07abc)

 Contents

    1  Purpose
    7  Accuracy
    10  Example

1  Purpose

nag_is_nan (x07abc) determines whether a floating-point number is a NaN (Not A Number).

2  Specification

#include <nag.h>
#include <nagx07.h>
Nag_Boolean  nag_is_nan (double x)

3  Description

nag_is_nan (x07abc) returns Nag_TRUE if and only if x is a NaN, and returns Nag_FALSE otherwise.

4  References

IEEE (2008) Standard for Floating-Point Arithmetic IEEE Standard 754-2008 IEEE, New York.

5  Arguments

1:     x doubleInput
On entry: the number whose status is to be determined.

6  Error Indicators and Warnings

None.

7  Accuracy

Not applicable.

8  Parallelism and Performance

nag_is_nan (x07abc) is not threaded in any implementation.

9  Further Comments

None.

10  Example

See Section 10 in nag_is_finite (x07aac).

nag_is_nan (x07abc) (PDF version)
x07 Chapter Contents
x07 Chapter Introduction
NAG Library Manual

© The Numerical Algorithms Group Ltd, Oxford, UK. 2016