significandf (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():
/* 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).
Interface Attribute Value
significand (), significandf (), significandl () Thread safety MT-Safe
 

CONFORMING TO

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

SEE ALSO

ilogb(3), scalb(3)

Information

Source
Linux kernel
OS/version
GNU
Source updated
September 15, 2017
Page created
February 9, 2018
Page generated
December 2, 2018