Math.Floor Method
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Returns the largest integer less than or equal to the specified double-precision floating-point number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
<SecuritySafeCriticalAttribute> _
Public Shared Function Floor ( _
d As Double _
) As Double
[SecuritySafeCriticalAttribute]
public static double Floor(
double d
)
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.
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.
Examples
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
double[] values = { 7.03, 7.64, 0.12, -0.12, -7.1, -7.6 };
outputBlock.Text += " Value Ceiling Floor\n" + "\n";
foreach (double value in values)
outputBlock.Text += String.Format("{0,7} {1,16} {2,14}",
value, Math.Ceiling(value), Math.Floor(value)) + "\n";
// 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
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.