| Description |
The DaysBetween function subtracts the FromDate from the ToDate, returning the number whole days difference.
The time value of each date is taken account of - only whole 24 hour chunks are counted as whole days.
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| Notes |
A whole day does not have to start at 00:00:00.
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| Related commands |
| DaysInAMonth |
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Gives the number of days in a month |
| DaysInAYear |
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Gives the number of days in a year |
| DaySpan |
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Gives the fractional number of days between 2 dates |
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| Example code : Find the days difference between two date+time values. |
// Full Unit code.
// -----------------------------------------------------------
// You must store this code in a unit called Unit1 with a form
// called Form1 that has an OnCreate event called FormCreate.
unit Unit1;
interface
uses
DateUtils, // Unit containing the DaysBetween command
SysUtils,
Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;
var
Form1: TForm1;
implementation
{$R *.dfm} // Include form definitions
procedure TForm1.FormCreate(Sender: TObject);
var
fromdate, toDate : TDateTime;
begin
// Set up our date variables
fromDate := EncodeDateTime(2000, 02, 26, 10, 0, 0, 0);
toDate := EncodeDateTime(2000, 02, 29, 9, 0, 0, 0);
// Display these dates and the days between them
ShowMessage('From date = '+DateTimeToStr(fromDate));
ShowMessage('To date = '+DateTimeToStr(toDate));
ShowMessage('Whole days difference = '+
IntToStr(DaysBetween(toDate, fromDate))+' days');
end;
end.
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| Hide full unit code |
From date = 26/02/2000 10:00:00
To date = 29/02/2000 09:00:00
Whole days difference = 2 days
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