scalb, scalbf, scalbl - multiply floating-point number by integral power of radix (OBSOLETE)

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ scalb(), scalbf(), scalbl()                                                 │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       Before glibc 2.20, these functions did not set errno for domain and range errors.

       These functions multiply their first argument x by FLT_RADIX (probably 2) to the power of exp, that is:

           x * FLT_RADIX ** exp

       The definition of FLT_RADIX can be obtained by including <float.h>.

       See  math_error(7)  for  information on how to determine whether an error has occurred when calling these
       functions.

       The following errors can occur:

       Domain error: x is 0, and exp is positive infinity, or x is positive infinity and exp is negative
       infinity and the other argument is not a NaN
              errno is set to EDOM.  An invalid floating-point exception (FE_INVALID) is raised.

       Range error, overflow
              errno is set to ERANGE.  An overflow floating-point exception (FE_OVERFLOW) is raised.

       Range error, underflow
              errno is set to ERANGE.  An underflow floating-point exception (FE_UNDERFLOW) is raised.

scalb()
              4.3BSD.  Obsolescent in POSIX.1-2001; Removed in POSIX.1-2008, recommending the use of scalbln(3),
              scalblnf(3), or scalblnl(3) instead.

       Math library (libm, -lm)

       scalb, scalbf, scalbl - multiply floating-point number by integral power of radix (OBSOLETE)

       On success, these functions return x * FLT_RADIX ** exp.

       If x or exp is a NaN, a NaN is returned.

       If  x  is  positive  infinity  (negative  infinity),  and exp is not negative infinity, positive infinity
       (negative infinity) is returned.

       If x is +0 (-0), and exp is not positive infinity, +0 (-0) is returned.

       If x is zero, and exp is positive infinity, a domain error occurs, and a NaN is returned.

       If x is an infinity, and exp is negative infinity, a domain error occurs, and a NaN is returned.

       If the result overflows, a  range  error  occurs,  and  the  functions  return  HUGE_VAL,  HUGE_VALF,  or
       HUGE_VALL, respectively, with a sign the same as x.

       If the result underflows, a range error occurs, and the functions return zero, with a sign the same as x.

ldexp(3), scalbln(3)

Linux man-pages 6.9.1                              2024-05-02                                           scalb(3)

       None.

#include<math.h>[[deprecated]]doublescalb(doublex,doubleexp);[[deprecated]]floatscalbf(floatx,floatexp);[[deprecated]]longdoublescalbl(longdoublex,longdoubleexp);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       scalb():
           _XOPEN_SOURCE >= 500
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

       scalbf(), scalbl():
           _XOPEN_SOURCE >= 600
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE