Calculate the number of whole years between two TDateTime values.
Source position: dateutil.inc line 278
function YearsBetween( |
const ANow: TDateTime; |
const AThen: TDateTime; |
AExact: Boolean = False |
):Integer; |
ANow |
|
First moment in time. |
AThen |
|
Second moment in time. |
Number of whole years between ANow and AThen.
YearsBetween returns the number of whole years between ANow and AThen. This number is an approximation, based on an average number of days of 365.25 per year (average over 4 years). This means the fractional part of a year is dropped.
|
Calculate the number of whole months between two TDateTime values. |
|
|
Calculate the number of whole weeks between two TDateTime values. |
|
|
Number of whole days between two TDateTime values. |
|
|
Calculate the number of whole hours between two TDateTime values. |
|
|
Calculate the number of whole minutes between two TDateTime values. |
|
|
Calculate the number of whole seconds between two TDateTime values. |
|
|
Calculate the number of whole milliseconds between two TDateTime values. |
|
|
Calculate the approximate number of years between two TDateTime values. |
Program Example55; { This program demonstrates the YearsBetween function } Uses SysUtils,DateUtils; Procedure Test(ANow,AThen : TDateTime); begin Write('Number of years between '); Write(DateToStr(AThen),' and ',DateToStr(ANow)); Writeln(' : ',YearsBetween(ANow,AThen)); end; Var D1,D2 : TDateTime; Begin D1:=Today; D2:=Today-364; Test(D1,D2); D2:=Today-365; Test(D1,D2); D2:=Today-366; Test(D1,D2); D2:=Today-390; Test(D1,D2); D2:=Today-368; Test(D1,D2); D2:=Today-1000; Test(D1,D2); End.