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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)

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NAG Library Manual

NAG Library Function Documentnag_is_nan (x07abc)