remainder, remainderf, remainderl - remainder from division

Syntax	#include <math.h> double remainder (double x, double y); C11 float remainderf(float x, float y); long double remainderl(long double x, long double y); (End)
Description	These functions return the floating-point remainder from dividing x by y. More precisely, they return the value r = x - yn if y != 0, where n is the integer closest to the exact value x/y. If |n - x/y| =  1/ 2, the even value is chosen for n.
Return val.	Floating-point remainder = x-ny
		if y != 0.
	HUGE_VAL HUGE_VALF HUGE_VALL	depending on the function type, if y = 0.                        errno wird gesetzt, um den Fehler anzuzeigen.
Errors	remainder(), remainderf() and remainderl() will fail if:
	EDOM	y = 0 .
See also	abs(), remquo(), math.h.