Defined in header <math.h> float scalbnf( float arg, int exp ); (1) (since C99) double scalbn( double arg, int exp ); (2) (since C99) long double scalbnl( long double arg, int exp ); (3) (since C99) Defined in header <tgmath.h> #define scalbn( arg, exp ) (4) (since C99) Defined in header <math.h> float scalblnf( float arg, long exp ); (5) (since C99) double scalbln( double arg, long exp ); (6) (since