[Overview][Constants][Procedures and functions][Index] |
Calculate the approximate number of days between two TDateTime values.
Source position: dateutil.inc line 287
function DaySpan( |
const ANow: TDateTime; |
const AThen: TDateTime |
):Double; |
ANow |
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First moment in time |
AThen |
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Second moment in time |
Number (fractions included) of days between ANow and AThen
DaySpan returns the number of Days between ANow and AThen, including any fractional parts of a Day.
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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 weeks 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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Number of whole days between two TDateTime values. |
Program Example66; { This program demonstrates the DaySpan function } Uses SysUtils,DateUtils; Procedure Test(ANow,AThen : TDateTime); begin Write('Number of days between '); Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow)); Writeln(' : ',DaySpan(ANow,AThen)); end; Var D1,D2 : TDateTime; Begin D1:=Now; D2:=Today-23/24; Test(D1,D2); D2:=Today-1; Test(D1,D2); D2:=Today-25/24; Test(D1,D2); D2:=Today-26/24; Test(D1,D2); D2:=Today-5.4; Test(D1,D2); D2:=Today-2.5; Test(D1,D2); End.