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.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- d
- Type: System.Double
A double-precision floating-point number.
Return Value
Type: System.DoubleThe 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