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/.

GNU                                                2017-09-15                                     SIGNIFICAND(3)