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.NET Framework Class Library

Math.Floor Method (Decimal)

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

Namespace:  System
Assemblies:   mscorlib (in mscorlib.dll)
  System.Runtime.Extensions (in System.Runtime.Extensions.dll)
Public Shared Function Floor ( _
	d As Decimal _
) As Decimal

Parameters

d
Type: System.Decimal

A decimal number.

Return Value

Type: System.Decimal
The largest integer less than or equal to d. Note that the method returns an integral value of type Math.

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.

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

Dim values() As Decimal = {7.03d, 7.64d, 0.12d, -0.12d, -7.1d, -7.6d}
Console.WriteLine("  Value          Ceiling          Floor")
Console.WriteLine()
For Each value As Decimal In values
   Console.WriteLine("{0,7} {1,16} {2,14}", _
                     value, Math.Ceiling(value), Math.Floor(value))
Next    
' The example displays the following output to the console: 
'         Value          Ceiling          Floor 
'        
'          7.03                8              7 
'          7.64                8              7 
'          0.12                1              0 
'         -0.12                0             -1 
'          -7.1               -7             -8 
'          -7.6               -7             -8

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library