X07BAF (PDF version)
X07 Chapter Contents
X07 Chapter Introduction
NAG Library Manual

NAG Library Routine Document

X07BAF

+− Contents

    1  Purpose
    2  Specification
    3  Description
    4  References
    5  Parameters
    6  Error Indicators and Warnings
    7  Accuracy
    8  Further Comments
    9  Example

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