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

StartOfAWeek

Return a day of the week, given a year, week and day in the week.

Declaration

Source position: dateutil.inc line 168

function StartOfAWeek(

  const AYear: Word;

  const AWeekOfYear: Word;

  const ADayOfWeek: Word

):TDateTime;

function StartOfAWeek(

  const AYear: Word;

  const AWeekOfYear: Word

):TDateTime;

Arguments

AYear

  

Year

AWeekOfYear

  

Week in the year

ADayOfWeek

  

Day in the week (default 1)

Function result

First day of the given week, in TDateTime format.

Arguments

AYear

  

Year

AWeekOfYear

  

Week in the year

Description

StartOfAWeek returns a TDateTime value with the date of the indicated day of the week indicated by the AYear, AWeek, ADayOfWeek values.

The default value for ADayOfWeek is 1.

See also

StartOfTheWeek

  

Return the first day of the week, given a date.

EndOfTheWeek

  

Calculate a TDateTime value which represents the end of a week, given a date in that week.

EndOfAWeek

  

Return the last moment of day of the week, given a year and a week in the year.

StartOfAMonth

  

Return first date of month, given a year/month pair.

EndOfTheYear

  

Calculate a TDateTime value representing the last day of a year, given a date in that year.

EndOfAYear

  

Calculate a TDateTime value representing the last day of a year

EndOfTheMonth

  

Calculate a TDateTime value representing the last day of the month, given a day in that month.

EndOfAMonth

  

Calculate a TDateTime value representing the last day of the indicated month

Example

Program Example34;

{ This program demonstrates the StartOfAWeek function }

Uses SysUtils,DateUtils;

Const
  Fmt = '"First day of this week : "dd mmmm yyyy hh:nn:ss';
  Fmt2 = '"Second day of this week : "dd mmmm yyyy hh:nn:ss';

Var
  Y,W : Word;

Begin
  Y:=YearOf(Today);
  W:=WeekOf(Today);
  Writeln(FormatDateTime(Fmt,StartOfAWeek(Y,W)));
  Writeln(FormatDateTime(Fmt2,StartOfAWeek(Y,W,2)));
End.

Documentation generated on: May 14 2021