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).

       ┌────────────────┬───────────────┬─────────┐
       │Interface       │ Attribute     │ Value   │
       ├────────────────┼───────────────┼─────────┤
       │significand(),  │ Thread safety │ MT-Safe │
       │significandf(), │               │         │
       │significandl()  │               │         │
       └────────────────┴───────────────┴─────────┘

CONFORMING TO

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

SEE ALSO

       ilogb(3), scalb(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A  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/.