nag_machine_real_largest (x02al) 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 nag_machine_model_base (x02bh)) and

e_{\max}

is the maximum exponent (see nag_machine_model_maxexp (x02bl)) in the model.

References

None.

Parameters

Compulsory Input Parameters

None.

Optional Input Parameters

None.

Output Parameters

1: $result$ – double scalar: The result of the function.

Error Indicators and Warnings

None.

Accuracy

None.

Further Comments

None.

Example

See Example in nag_machine_precision (x02aj).

Open in the MATLAB editor: x02al_example

function x02al_example


fprintf('x02al example results\n\n');

fprintf('the largest positive model number = %22.15e\n', ...
        x02al);

x02al example results

the largest positive model number = 1.797693134862316e+308

PDF version (NAG web site, 64-bit version, 64-bit version)

Chapter Contents

Chapter Introduction

NAG Toolbox