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SIGNIFICAND

Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
Index Return to Main Contents
 

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).
InterfaceAttributeValue
significand(),
significandf(),
significandl() 		Thread safetyMT-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 4.09 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/.

 

Index

NAME
SYNOPSIS
DESCRIPTION
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON
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