ILOGB(3) BSD Library Functions Manual ILOGB(3)
NAME
ilogb -- return exponent as an integer value
SYNOPSIS
#include <math.h>
int
ilogb(double x);
int
ilogbf(float x);
DESCRIPTION
The ilogb() and ilogbf() functions return the exponent of x as a signed integer value.
SPECIAL VALUES
ilogb(+-0) returns - INT_MAX.
ilogb(+-infinity) returns INT_MAX.
ilogb(x) returns INT_MAX if x is a NaN.
A range error may occur if x is 0.
SEE ALSO
math(3)
STANDARDS
The ilogb() and ilogbf() functions conform to ISO/IEC 9899:1999(E).
BSD
July 22, 2003 BSD
