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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);

     long double
     logbl(long double x);

     float
     logbf(float x);

DESCRIPTION
     The logb() functions return the exponent of x, represented as a floating-point floatingpoint
     point number.

SPECIAL VALUES
     logb(+-0) returns -infinity and raises the "divide-by-zero" floating-point floatingpoint
     point exception.

     logb(+-infinity) returns +infinity.

SEE ALSO
     ilogb(3)

STANDARDS
     The logb() functions conform to ISO/IEC 9899:1999(E).

BSD                              July 24, 2003                             BSD