LOG(3) Linux Programmer's Manual LOG(3)
log, logf, logl - natural logarithmic function
double log(double x);
float logf(float x);
long double logl(long double x);
Link with -lm.
The log() function returns the natural logarithm of x.
EDOM The argument x is negative.
ERANGE The argument x is zero. The log of zero is not defined (minus
SVr4, 4.3BSD, C89. The float and long double variants are C99 require-
cbrt(3), clog(3), log1p(3), sqrt(3)
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