fmod - floating-point remainder function
#include <math.h>
double fmod(double x, double y);
The fmod() function computes the remainder of dividing x by y. The
return value is x - n * y, where n is the quotient of x / y, rounded
towards zero to an integer.
The fmod() function returns the remainder, unless y is zero, when the
function fails and errno is set.
EDOM The denominator y is zero.
SVID 3, POSIX, BSD 4.3, ISO 9899
drem(3)
1993-06-06 FMOD(3)
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