Math.Floor Method (Decimal)


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

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

Public Shared Function Floor (
	d As Decimal
) As Decimal


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")
For Each value As Decimal In values
   Console.WriteLine("{0,7} {1,16} {2,14}", _
                     value, Math.Ceiling(value), Math.Floor(value))
' 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

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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