The remainder() function returns the floating point remainder r = x - ny when y is non-zero. The value n is the integral value nearest the exact value x/y. When |n - x/y| = ½, the value n is chosen to be even.

The behavior of remainder() is independent of the rounding mode.

The remainder() function returns the floating point remainder r = x - ny when y is non-zero.

When y is 0, remainder() returns NaN. and sets errno to EDOM.

If the value of x is +-Inf, remainder() returns NaN and sets errno to EDOM.

If x or y is NaN, then the function returns NaN.

The remainder() function will fail if:

EDOM

The y argument is 0 or the x argument is positive or negative infinity.

The remainder() function computes the remainder x REM y required by ANSI/IEEE 754 (IEC 559).

See attributes(5) for descriptions of the following attributes:

fmod(3M), attributes(5)