NAG Library Routine Document

x02amf  (real_safe)

 Contents

    1  Purpose
    7  Accuracy
    10  Example

1
Purpose

x02amf returns the safe range of floating-point arithmetic.

2
Specification

Fortran Interface
Function x02amf ( )
Real (Kind=nag_wp):: x02amf
C Header Interface
#include nagmk26.h
double  x02amf_ ()

3
Description

x02amf is defined to be the smallest positive model number z such that for any x in the range [z,1/z] the following can be computed without undue loss of accuracy, overflow, underflow or other error:

4
References

None.

5
Arguments

None.

6
Error Indicators and Warnings

None.

7
Accuracy

None.

8
Parallelism and Performance

x02amf is not threaded in any implementation.

9
Further Comments

None.

10
Example

See Section 10 in x02ajf.
© The Numerical Algorithms Group Ltd, Oxford, UK. 2017