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    Command:

    scalbl

    
    
    
    

    SYNOPSIS

           #include <math.h>
    
           double scalb(double x, double exp);
           float scalbf(float x, float exp);
           long double scalbl(long double x, long double exp);
    
           Link with -lm.
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           scalb():
               _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 500 ||
               _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
           scalbf(), scalbl():
               _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600
    
    
    

    DESCRIPTION

           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>.
    
    
    

    RETURN VALUE

           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.
    
    
    

    ERRORS

           See  math_error(7) for information on how to determine whether an error
           has occurred when calling these functions.
           These functions do not set errno.
    
    
    

    CONFORMING TO

           scalb()   is   specified   in  POSIX.1-2001,  but  marked  obsolescent.
           POSIX.1-2008 removes the specification of scalb(), recommending the use
           of  scalbln(3), scalblnf(3), or scalblnl(3) instead.  The scalb() func-
           tion is from 4.3BSD.
    
           scalbf() and scalbl()  are  unstandardized;  scalbf()  is  nevertheless
           present on several other systems
    
    
    

    SEE ALSO

           ldexp(3), scalbln(3)
    
                                      2013-03-23                          SCALB(3)
    
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