significand(3) Linux Man Page

Name

significand, significandf, significandl - get mantissa of floating-point number

Math library ( libm ", " -lm )

#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

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.

For an explanation of the terms used in this section, see attributes(7). allbox; lbx lb lb T{ significand()significandf()significandl()

Interface	Attribute	Value
T}	Thread safety	MT-Safe

None.

significand() BSD.

significand() BSD.