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