scalbln

scalbn

#include <math.h>float scalbnf(float val, int exp);double scalbn(double val, int exp); long double scalbnl(long double val, int exp);

scalbn( ), scalbnf( ), and scalbnl( ) were added by C99.

The scalbn( ) family of functions returns the product of val and FLT_RADIX raised to the exp power. That is,

val * FLT_RADIX^exp

The macro FLT_RADIX is defined in <float.h> and its value is the radix of exponent representation.

A related function is scalbln( ).