significand - Man Page

get mantissa of floating-point number

Library

Math library (libm, -lm)

Synopsis

#include <math.h>

double significand(double x);
float significandf(float x);
long double significandl(long double x);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

significand(), significandf(), significandl():

    /* Since glibc 2.19: */ _DEFAULT_SOURCE
        || /* Glibc <= 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).

InterfaceAttributeValue
significand(), significandf(), significandl()Thread safetyMT-Safe

Standards

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

See Also

ilogb(3), scalb(3)

Referenced By

ilogb(3).

The man pages significandf(3) and significandl(3) are aliases of significand(3).

2022-12-15 Linux man-pages 6.02