# Math::IEEERemainder Method

.NET Framework 4.5

Returns the remainder resulting from the division of a specified number by another specified number.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

## Syntax

```public:
static double IEEERemainder(
double x,
double y
)
```

#### Parameters

x
Type: System::Double

A dividend.

y
Type: System::Double

A divisor.

#### Return Value

Type: System::Double
A number equal to x - (y Q), where Q is the quotient of x / y rounded to the nearest integer (if x / y falls halfway between two integers, the even integer is returned).
If x - (y Q) is zero, the value +0 is returned if x is positive, or -0 if x is negative.
If y = 0, NaN is returned.

## Remarks

This operation complies with the remainder operation defined in Section 5.1 of ANSI/IEEE Std 754-1985; IEEE Standard for Binary Floating-Point Arithmetic; Institute of Electrical and Electronics Engineers, Inc; 1985.

The IEEERemainder method is not the same as the modulus operator. Although both return the remainder after division, the formulas they use are different. The formula for the IEEERemainder method is:

```IEEERemainder = dividend - (divisor * Math.Round(dividend / divisor))
```

In contrast, the formula for the modulus operator is:

```Modulus = (Math.Abs(dividend) - (Math.Abs(divisor) *
(Math.Floor(Math.Abs(dividend) / Math.Abs(divisor))))) *
Math.Sign(dividend)
```

## Examples

The following example contrasts the remainder returned by the IEEERemainder method with the remainder returned by the modulus division operator.

No code example is currently available or this language may not be supported.

## Version Information

#### .NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

#### .NET Framework Client Profile

Supported in: 4, 3.5 SP1

#### XNA Framework

Supported in: 3.0, 2.0, 1.0

#### Portable Class Library

Supported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8