[Overview][Constants][Procedures and functions][Index] Reference for unit 'dateutils' (#rtl)

WeeksBetween

Calculate the number of whole weeks between two DateTime values

Declaration

Source position: dateutil.inc line 258

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.

See also

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.
Documentation generated on: Mar 17 2017