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# Math.Floor Method (Decimal)

.NET Framework 3.0
Returns the largest integer less than or equal to the specified decimal number.

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

## Syntax

```public static decimal Floor (
decimal d
)
```
```public static Decimal Floor (
Decimal d
)
```
```public static function Floor (
d : decimal
) : decimal
```
```Not applicable.
```

#### Parameters

d

A decimal number.

#### Return Value

The largest integer less than or equal to d.

## Remarks

The behavior of this method follows IEEE Standard 754, section 4. This kind of rounding is sometimes called rounding toward negative infinity. In other words, if d is positive, any fractional component is truncated. If d is negative, the presence of any fractional component causes it to be rounded to the smaller integer. The operation of this method differs from the Ceiling method, which supports rounding toward positive infinity.

## Example

The following example illustrates the Math.Floor(Decimal) method and contrasts it with the Ceiling(Decimal) method.

## Platforms

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

## Version Information

#### .NET Framework

Supported in: 3.0, 2.0