SIGNIFICAND

NAME
SYNOPSIS
DESCRIPTION
ATTRIBUTES
CONFORMING TO
SEE ALSO
COLOPHON

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).

Image grohtml-190461.png

CONFORMING TO

These functions are nonstandard; the double version is available on a number of other systems.

SEE ALSO

ilogb(3), scalb(3)

COLOPHON

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