scalb, scalbf, scalbl, scalbn, scalbnf, scalbnl, scalbln, scalblnf, scalblnl - multiply floating-point number by integral power of radix

#include <math.h> I double scalb(double x , double exp );
I float scalbf(float x , double exp );
I long double scalbl(long double x , double exp ); I double scalbn(double x , int exp );
I float scalbnf(float x , int exp );
I long double scalbnl(long double x , int exp ); I double scalbln(double x , long int exp );
I float scalblnf(float x , long int exp );
I long double scalblnl(long double x , long int exp ); Link with -lm.

These functions multiply their first argument x by FLT_RADIX (probably 2) to the power R exp . If FLT_RADIX equals 2, then R scalbn () is equivalent to ldexp(3). The value of FLT_RADIX is found in R <float.h> .

The R scalb () function is from 4.3BSD. The R scalbn () and R scalbln () functions are from C99. All three are in POSIX.1-2001. The R scalb () function is marked obsolescent.

ldexp(3)