Obtain YYYYMM String from Now in Delphi 4

Question

I want to obtain an string 'YYYYMM' from Now procedure and from the month before the current one in Delphi 4.

For example: 202106 (Now) and 202105 (Now - 1)

How can afford that?

Answer 1

You can use DecodeDate to split a TDateTime - like Now - into year, month and day parts. Then you can use Format to create the string with a 4 digits year and month as 2 digits with leading zeros:

var
    Year, Month, Day: Word;
    Today     : TDateTime;
    Yesterday : TDateTime;
    SToday     : String;
    SYesterday : String;
begin
    Today     := Now;
    Yesterday := Today - 1;

    DecodeDate(Today, Year, Month, Day);
    SToday := Format('%04d%02d', [Year, Month]);

    DecodeDate(Yesterday, Year, Month, Day);
    SYesterday := Format('%04d%02d', [Year, Month]);
end;