SIGNIFICAND
Section: Linux Programmer's Manual (3)
Updated: 2017-09-15
Page Index
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(),
significandf(),
significandl()
| Thread safety | MT-Safe
|
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 5.10 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/.