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
    2  Specification
    3  Description
    4  References
    5  Arguments
    6  Error Indicators and Warnings
    7  Accuracy
    8  Parallelism and Performance
    9  Further Comments
    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. 2017