Floor Method (Double)
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Math.Floor Method (Double)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Returns the largest integer less than or equal to the specified double-precision floating-point number.

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

'Declaration
Public Shared Function Floor ( _
	d As Double _
) As Double

Parameters

d
Type: System.Double
A double-precision floating-point number.

Return Value

Type: System.Double
The largest integer less than or equal to d. If d is equal to NaN, NegativeInfinity, or PositiveInfinity, that value is returned.

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 demonstrates the Floor method and contrasts it with the Ceiling method.


Dim values() As Double = {7.03, 7.64, 0.12, -0.12, -7.1, -7.6}
outputBlock.Text &= "  Value          Ceiling          Floor" & vbCrLf
outputBlock.Text &= vbCrLf
For Each value As Double In values
   outputBlock.Text += String.Format("{0,7} {1,16} {2,14}", _
                     value, Math.Ceiling(value), Math.Floor(value)) & vbCrLf
Next
' The example displays the following output:
'         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


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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