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    Command:

    scalbln

    
    
    
    

    SYNOPSIS

           #include <math.h>
    
           double scalbln(double x, long int exp);
           float scalblnf(float x, long int exp);
           long double scalblnl(long double x, long int exp);
    
           double scalbn(double x, int exp);
           float scalbnf(float x, int exp);
           long double scalbnl(long double x, int exp);
    
           Link with -lm.
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           scalbln(), scalblnf(), scalblnl():
                  _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
                  _POSIX_C_SOURCE >= 200112L;
                  or cc -std=c99
           scalbn(), scalbnf(), scalbnl():
                  _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 ||
                  _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
                  or cc -std=c99
    
    
    

    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 is a NaN, a NaN is returned.
    
           If x is positive infinity (negative infinity), positive infinity (nega-
           tive infinity) is returned.
    
           If x is +0 (-0), +0 (-0) 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
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The  scalbn(),  scalbnf(),  scalbnl(), scalbln(), scalblnf(), and scal-
           blnl() functions are thread-safe.
    
    
    

    CONFORMING TO

           C99, POSIX.1-2001.
    
    
    

    NOTES

           These  functions  differ  from  the  obsolete  functions  described  in
           scalb(3) in the type of their second argument.  The functions described
           on this page have a second argument of an integral type, while those in
           scalb(3) have a second argument of type double.
    
           If  FLT_RADIX equals 2 (which is usual), then scalbn() is equivalent to
           ldexp(3).
    
    
    

    SEE ALSO

           ldexp(3), scalb(3)
    
                                      2013-06-21                        SCALBLN(3)
    
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