Calculate the approximate number of weeks between two TDateTime values.
Source position: dateutil.inc line 295
function WeekSpan( |
const ANow: TDateTime; |
const AThen: TDateTime |
):Double; |
ANow |
|
First moment in time. |
AThen |
|
Second moment in time. |
Number (fractions included) of weeks between ANow and AThen.
WeekSpan returns the number of weeks between ANow and AThen, including any fractional parts of a week.
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Calculate the approximate number of years between two TDateTime values. |
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Calculate the approximate number of months between two TDateTime values. |
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Calculate the approximate number of days between two TDateTime values. |
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Calculate the approximate number of hours between two TDateTime values. |
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Calculate the approximate number of minutes between two TDateTime values. |
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Calculate the approximate number of seconds between two TDateTime values. |
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Calculate the approximate number of milliseconds between two TDateTime values. |
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Calculate the number of whole weeks between two TDateTime values. |
Program Example57; { This program demonstrates the WeekSpan function } Uses SysUtils,DateUtils; Procedure Test(ANow,AThen : TDateTime); begin Write('Number of weeks between '); Write(DateToStr(AThen),' and ',DateToStr(ANow)); Writeln(' : ',WeekSpan(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.