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(): _SVID_SOURCE ||
       _BSD_SOURCE

DESCRIPTION
       The  significand()  function  returns  the  mantissa of x scaled to the
       range [1,2).  It is equivalent to

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

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

CONFORMING TO
       These  functions are non-standard; the double version is available on a
       number of other systems.

SEE ALSO
       ilogb(3), scalb(3)

COLOPHON
       This page is part of release 3.23 of the Linux  man-pages  project.   A
       description  of  the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.