Math.Floor Method (Double)
Returns the largest integer less than or equal to the specified double-precision floating-point number.
Namespace: System
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 illustrates the Math.Floor(Double) method and contrasts it with the Ceiling(Double) method.
double[] values = {7.03, 7.64, 0.12, -0.12, -7.1, -7.6}; Console.WriteLine(" Value Ceiling Floor\n"); foreach (double value 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
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
