Linux manual pages Section 3  

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);
 
[Note] Note
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
significand(), significandf(), significandl():
_SVID_SOURCE || _BSD_SOURCE
[Note] Note

Link with −lm.

DESCRIPTION

The significand() function returns the mantissa of x scaled to the range [1,2). It is equivalent to

scalb(x, (double) −ilogb(x))

This function exists mainly for use in certain standardized tests for IEEE 754 conformance.

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 3.33 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man-pages/.


  Copyright 2002 Walter Harms (walter.harmsinformatik.uni-oldenburg.de)
Distributed under GPL
heavily based on glibc infopages, copyright Free Software Foundation