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Manual Reference Pages  - EXP (3)

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log, logf, logl - natural logarithmic function

CONTENTS

Synopsis
Description
Errors

#include <math.h> 



double log(double x); 



float logf(float x); 



long double logl(long double x); 

The log() function returns the natural logarithm of x.

The log() function can return the following errors:

EDOM	The argument x is negative.
ERANGE	The argument x is zero. The log of zero is not defined (minus infinity).

SVID 3, POSIX, BSD 4.3, ISO 9899. The float and the long double variants are C99 requirements.

sqrt(3), cbrt(3)

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