significand(3) — Linux manual page

significand(3)          Library Functions Manual          significand(3)

NAME

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

LIBRARY

       Math library (libm, -lm)

SYNOPSIS

       #include <math.h>

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

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

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

DESCRIPTION

       These functions return the mantissa of x scaled to the range
       [1, FLT_RADIX).  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(), significandf(),      │ Thread safety │ MT-Safe │
       │ significandl()                      │               │         │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       None.

       significand()
              BSD.

HISTORY

       significand()
              BSD.

SEE ALSO

       ilogb(3), scalb(3)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                 significand(3)

Pages that refer to this page: ilogb(3)

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