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EXP (3) | C library functions | Unix Manual Pages | :man

NAME

log - natural logarithmic function

CONTENTS

Synopsis
Description
Errors

SYNOPSIS



#include <math.h>



"double log(double "x);



"float logf(float "x);



"long double logl(long double "x);

DESCRIPTION

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

ERRORS

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).

"CONFORMING TO"

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

"SEE ALSO"

sqrt(3), cbrt(3)


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