LOGB(3) BSD Library Functions Manual LOGB(3)
NAME
logb -- return exponent as a floating-point number
SYNOPSIS
#include <math.h>
double
logb(double x);
float
logbf(float x);
DESCRIPTION
The logb() and logbf() functions return the exponent of x, represented as a floating-point number.
SPECIAL VALUES
logb(+-0) returns -infinity and raises the "divide-by-zero" floating-point exception.
logb(+-infinity) returns +infinity.
SEE ALSO
ilogb(3)
STANDARDS
The logb() and logbf() functions conform to ISO/IEC 9899:1999(E).
BSD
July 24, 2003 BSD
