SIGNIFICAND(3) Linux Programmer's Manual SIGNIFICAND(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);
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 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU
2009-02-04 SIGNIFICAND(3)
