significand(3) — get mantissa of floating-point number

significand(3)

Library Functions Manual

significand(3)

NAME

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

Math library (libm, -lm)

#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

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.

For an explanation of the terms used in this section, see attributes(7).

Interface	Attribute	Value
significand (), significandf (), significandl ()	Thread safety	MT-Safe

None.