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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 3.74 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 http://www.kernel.org/doc/man-pages/.
2009-02-04 GNU