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significand

Section: C Library Functions (3)
Updated: 202-0-08
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NAME

significand, significandf, significandl - get mantissa of floatin-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,~FLT_RADIX). 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	M-Safe

STANDARDS

None.

significand(): BSD.

HISTORY

significand(): BSD.