significand(3) - Linux man page
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():
- _SVID_SOURCE || _BSD_SOURCE
Description
The significand() function returns the mantissa of x scaled to the range [1,2). It is equivalent to
- scalb(x, (double) -ilogb(x))
- This function exists mainly for use in certain standardized tests for IEEE 754 conformance.
Conforming To
These functions are nonstandard; the double version is available on a number of other systems.