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Truncate  
Method  
Drops the fractional part of a decimal number
Decimal Structure
System NameSpace
CF1.  Function Truncate ( Value : Decimal ) : Decimal; Static;
CF : Methods with this mark are Compact Framework Compatible
Description
The Truncate function rounds a decimal number Value to a whole value (integer) by removing the fractional part.
 
Therefore negative numbers become larger in absolute value, and positive numbers become smaller.
 
The optional DecPlaces parameter defines this precision, up to a maximum of 28 decimal places.
 
The rounding uses Bankers rules, where an exact half value causes a rounding to an even number:
 
12.4 rounds to  12
12.5 rounds to  12 // Round down to even
12.6 rounds to  13
 
13.4 rounds to  13
13.5 rounds to  14 // Round up to even
13.6 rounds to  14
Notes
Compare with Floor and Round.

Static methods are not methods of an object - they are simply class functions or procedures available at any time.
Microsoft MSDN Links
System
System.Decimal
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A simple example
program Project1;
{$APPTYPE CONSOLE}

var
  valueA, valueB : Decimal;
  result         : Decimal;

begin
  valueA := 1.2;
  valueB := -1.2;

  Console.WriteLine('valueA          = {0}', valueA.ToString);
  Console.WriteLine('valueB          = {0}', valueB.ToString);

Console.WriteLine;

  result := System.Decimal.Truncate(valueA);
  Console.WriteLine('valueA truncate = ' + result.ToString);
  result := System.Decimal.Truncate(valueB);
  Console.WriteLine('valueB truncate = ' + result.ToString);

  Console.ReadLine;
end.
   valueA          = 1.2
   valueB          = -1.2
  
   valueA truncate = 1
   valueB truncate = -1
 
 
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