WeeksBetween

Calculate the number of whole weeks between two DateTime values

Declaration

Source position: dateutil.inc line 256

function WeeksBetween(

const ANow: TDateTime;

const AThen: TDateTime

):Integer;

Arguments

`ANow`		First moment in time
`AThen`		Second moment in time

Function result

Number of whole weeks between ANow and AThen.

Description

WeeksBetween returns the number of whole weeks between ANow and AThen. This means the fractional part of a Week is dropped.

YearsBetween		Calculate the number of whole years between two DateTime values
MonthsBetween		Calculate the number of whole months between two DateTime values
DaysBetween		Number of whole days between two DateTime values.
HoursBetween		Calculate the number of whole hours between two DateTime values.
MinutesBetween		Calculate the number of whole minutes between two DateTime values.
SecondsBetween		Calculate the number of whole seconds between two DateTime values.
MilliSecondsBetween		Calculate the number of whole milliseconds between two DateTime values.

Example

Program Example57;

{ This program demonstrates the WeeksBetween function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

begin
 Write('Number of weeks between ');
 Write(DateToStr(AThen),' and ',DateToStr(ANow));
 Writeln(' : ',WeeksBetween(ANow,AThen));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Today;
  D2:=Today-7;
  Test(D1,D2);
  D2:=Today-8;
  Test(D1,D2);
  D2:=Today-14;
  Test(D1,D2);
  D2:=Today-35;
  Test(D1,D2);
  D2:=Today-36;
  Test(D1,D2);
  D2:=Today-17;
  Test(D1,D2);
End.

Notes

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