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SIGNIFICAND(3) Linux Programmer's Manual SIGNIFICAND(3)

NAME

     significand,  significandf,  significandl  -  get mantissa of floating-
     point number

SYNOPSIS

     #include <math.h>

     double significand(double x);
     float significandf(float x);
     long double significandl(long double x);

     Link with -lm.

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

     significand(), significandf(), significandl():
         /* Since glibc 2.19: */ _DEFAULT_SOURCE
             || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

DESCRIPTION

     These functions return the mantissa of x scaled  to  the  range  [1,2).
     They are equivalent to

         scalb(x, (double) -ilogb(x))

     This  function  exists mainly for use in certain standardized tests for
     IEEE 754 conformance.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).

     allbox; lb lb lb l l l.  Interface Attribute Value T{ significand(),
     significandf(),
     significandl() T}   Thread safety  MT-Safe

CONFORMING TO

     These  functions  are nonstandard; the double version is available on a
     number of other systems.

SEE ALSO

     ilogb(3), scalb(3)

COLOPHON

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     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at
     https://www.kernel.org/doc/man-pages/.

GNU 2017-09-15 SIGNIFICAND(3)