X07BAF (PDF version)

X07 Chapter Contents

X07 Chapter Introduction

NAG Library Manual

NAG Library Routine Document

X07BAF

+− Contents

2 Specification

3 Description

4 References

5 Parameters

6 Error Indicators and Warnings

8 Further Comments

1 Purpose

X07BAF creates a signed infinite value.

2 Specification

SUBROUTINE X07BAF ( ISIGN, X)

INTEGER ISIGN

REAL (KIND=nag_wp) X

3 Description

X07BAF sets X to be positive or negative infinity.

4 References

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

5 Parameters

1: ISIGN – INTEGERInput: On entry: determines the sign of the infinity to be created.
If ISIGN is greater than or equal to $0$ , a positive infinity is returned, otherwise a negative infinity is returned.
2: X – REAL (KIND=nag_wp)Output: On exit: the required infinite value.

6 Error Indicators and Warnings

None.

7 Accuracy

Not applicable.

8 Further Comments

None.

9 Example

See Section 9 in X07AAF.

X07BAF (PDF version)

X07 Chapter Contents

X07 Chapter Introduction

NAG Library Manual

© The Numerical Algorithms Group Ltd, Oxford, UK. 2012