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

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ significand(), significandf(), significandl()                               │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       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.

significand()
              BSD.

       Math library (libm, -lm)

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

ilogb(3), scalb(3)

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

       None.

       significand()
              BSD.

#include<math.h>doublesignificand(doublex);floatsignificandf(floatx);longdoublesignificandl(longdoublex);

   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