#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():



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.


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

RELATED TO significandl…


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