[Overview][Constants][Procedures and functions][Index] |
Calculate the approximate number of hours between two TDateTime values.
Source position: dateutil.inc line 288
function HourSpan( |
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 hours between ANow and AThen
HourSpan returns the number of Hours between ANow and AThen, including any fractional parts of a Hour.
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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 days 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 hours between two TDateTime values. |
Program Example67; { This program demonstrates the HourSpan function } Uses SysUtils,DateUtils; Procedure Test(ANow,AThen : TDateTime); begin Write('Number of hours between '); Write(DateTimeToStr(AThen),' and ',DateTimeToStr(ANow)); Writeln(' : ',HourSpan(ANow,AThen)); end; Var D1,D2 : TDateTime; Begin D1:=Now; D2:=D1-(59*OneMinute); Test(D1,D2); D2:=D1-(61*OneMinute); Test(D1,D2); D2:=D1-(122*OneMinute); Test(D1,D2); D2:=D1-(306*OneMinute); Test(D1,D2); D2:=D1-(5.4*OneHour); Test(D1,D2); D2:=D1-(2.5*OneHour); Test(D1,D2); End.