x02alf returns the largest positive number in the model of floating-point arithmetic described in the X02 Chapter Introduction. The returned value is equal to

(1 - b^{- p}) \times b^{e_{\max}}

, where

b

is the arithmetic base (see x02bhf) and

e_{\max}

is the maximum exponent (see x02blf) in the model.

4 References

None.

5 Arguments

None.

6 Error Indicators and Warnings

None.

7 Accuracy

Not applicable.

8 Parallelism and Performance

x02alf is not threaded in any implementation.

9 Further Comments

None.

10 Example

See Section 10 in x02ajf.

NAG Library Manual, Mark 27

Interfaces: FL CL CPP AD

NAG FL Interface Introduction

X02 (Machine) Chapter Contents

X02 (Machine) Chapter Introduction

x02al: FL CL CPP AD

NAG FL Interfacex02alf (real_​largest)

▸▿ 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

NAG FL Interface
x02alf (real_largest)