NAME¶

significand, significandf, significandl - 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);

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).

STANDARDS¶

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

SEE ALSO¶

ilogb(3), scalb(3)