NAG C Library Manual, Mark 26
NAG Library Manual, Mark 26
NAG AD Library Manual, Mark 26
x07 Chapter Contents
x07 Chapter Introduction
NAG C Library Function Document
nag_is_nan (x07abc)
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NAG C Library Manual, Mark 26
NAG Library Manual, Mark 26
NAG AD Library Manual, Mark 26
x07 Chapter Contents
x07 Chapter Introduction
▸
▿
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
© The Numerical Algorithms Group Ltd. 2018
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
–
double
Input
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 C Library Manual, Mark 26
NAG Library Manual, Mark 26
NAG AD Library Manual, Mark 26
x07 Chapter Contents
x07 Chapter Introduction
© The Numerical Algorithms Group Ltd. 2018