LOG2(3) Linux Programmer's Manual LOG2(3)NAME
log2, log2f, log2l - base-2 logarithmic function
SYNOPSIS
#include <math.h>
double log2(double x);
float log2f(float x);
long double log2l(long double x);
Compile with -std=c99; link with -lm.
DESCRIPTION
The log2() function returns the base 2 logarithm of x.
ERRORS
The log2() function can return the following error:
EDOM The argument x is negative.
ERANGE The argument x is zero. The log of zero is not defined (minus
infinity).
CONFORMING TO
SVr4, 4.3BSD, C89. The float and long double variants are C99 require‐
ments.
SEE ALSOcbrt(3), clog2(3), sqrt(3)
2002-07-27 LOG2(3)