This statement returns 4:
DaysAfter(1996-12-20, 1996-12-24)
This statement returns -4:
DaysAfter(1996-12-24, 1996-12-20)
This statement returns 0:
DaysAfter(1996-12-24, 1996-12-24)
This statement returns 5:
DaysAfter(1994-12-29, 1995-01-03)
If you declare date1 and date2 date variables and assign February 16, 1996, to date1 and April 28, 1996, to date2 as follows:
date date1, date2
date1 = 1996-02-16
date2 = 1996-04-28
then each of the following statements returns 71:
DaysAfter(date1, date2)
DaysAfter(1996-02-16, date2)
DaysAfter(date1, 1996-04-28)
DaysAfter(1996-02-16, 1996-04-28)