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SIGNIFICAND

Section: Linux Programmer's Manual (3)
Updated: 2009-02-04
Index Return to Main Contents

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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():

_SVID_SOURCE || _BSD_SOURCE

 

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 3.35 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/.

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Index

NAME

SYNOPSIS

DESCRIPTION

CONFORMING TO

SEE ALSO

COLOPHON

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