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OpenDarwin 7.2.1 - man page for logb (opendarwin section 3)

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


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