FPDoc Onlineexperiment

WeeksBetween function

In unit DateUtils

Calculate the number of whole weeks between two TDateTime values.

Declaration

pascal

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

Example: `ex57`

pascal

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.

An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.