fmod, fmodf—floating-point remainder (modulo)Synopsis
#include <math.h> double fmod(double x, double y); float fmodf(float x, float y);
Description
The fmod and fmodf functions compute the floating-point
remainder of x/y (x modulo y).
Returns
The fmod function returns the value
x-i*y,
for the largest integer i such that, if y is nonzero, the
result has the same sign as x and magnitude less than the
magnitude of y.
fmod(x,0) returns NaN, and sets errno to EDOM.
Portability
fmod is ANSI C. fmodf is an extension.