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Decimal.Floor(Decimal) Method

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Definition

Namespace:
System
Assembly:
System.Runtime.dll
Assembly:
mscorlib.dll
Assembly:
netstandard.dll
Source:
Decimal.cs
Source:
Decimal.cs
Source:
Decimal.cs

Rounds a specified Decimal number to the closest integer toward negative infinity.

public:
 static System::Decimal Floor(System::Decimal d);
public:
 static System::Decimal Floor(System::Decimal d) = System::Numerics::IFloatingPoint<System::Decimal>::Floor;
public static decimal Floor (decimal d);
static member Floor : decimal -> decimal
Public Shared Function Floor (d As Decimal) As Decimal

Parameters

d
Decimal

The value to round.

Returns

Decimal

If d has a fractional part, the next whole Decimal number toward negative infinity that is less than d.

-or-

If d doesn't have a fractional part, d is returned unchanged. Note that the method returns an integral value of type Decimal.

Implements

Floor(TSelf)

Examples

The following example illustrates the Floor method and contrasts it with the Ceiling method.

using System;

public class Example
{
   public static void Main()
   {
      decimal[] values = {12.6m, 12.1m, 9.5m, 8.16m, .1m, -.1m,  -1.1m,
                          -1.9m, -3.9m};
      Console.WriteLine("{0,-8} {1,10} {2,10}\n",
                        "Value", "Ceiling", "Floor");
      foreach (decimal value in values)
      Console.WriteLine("{0,-8} {1,10} {2,10}", value,
                        Decimal.Ceiling(value), Decimal.Floor(value));
   }
}
// The example displays the following output:
//       Value       Ceiling      Floor
//
//       12.6             13         12
//       12.1             13         12
//       9.5              10          9
//       8.16              9          8
//       0.1               1          0
//       -0.1              0         -1
//       -1.1             -1         -2
//       -1.9             -1         -2
//       -3.9             -3         -4

open System

let values = 
    [ 12.6m; 12.1m; 9.5m; 8.16m; 0.1m; -0.1m;  -1.1m; -1.9m; -3.9m ]

printfn "%-8s %10s %10s\n" "Value" "Ceiling" "Floor"

for value in values do
    printfn $"%-8O{value} %10O{Decimal.Ceiling value} %10O{Decimal.Floor value}"

// The example displays the following output:
//       Value       Ceiling      Floor
//
//       12.6             13         12
//       12.1             13         12
//       9.5              10          9
//       8.16              9          8
//       0.1               1          0
//       -0.1              0         -1
//       -1.1             -1         -2
//       -1.9             -1         -2
//       -3.9             -3         -4

Module Example
   Public Sub Main()
      Dim values() As Decimal = {12.6d, 12.1d, 9.5d, 8.16d, .1d, -.1d,  
                                 -1.1d, -1.9d, -3.9d}
      Console.WriteLine("{0,-8} {1,10} {2,10}", 
                        "Value", "Ceiling", "Floor")
      Console.WriteLine()
      For Each value As Decimal In values
      Console.WriteLine("{0,-8} {1,10} {2,10}", value,
                        Decimal.Ceiling(value), Decimal.Floor(value))
      Next                                     
   End Sub
End Module
' The example displays the following output:
'       Value       Ceiling      Floor
'       
'       12.6             13         12
'       12.1             13         12
'       9.5              10          9
'       8.16              9          8
'       0.1               1          0
'       -0.1              0         -1
'       -1.1             -1         -2
'       -1.9             -1         -2
'       -3.9             -3         -4

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.

Applies to

See also