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' This example uses the DATEVALUE function to convert a string to a date
' value. A calculation is then made that tells you the date of two weeks
' before and after your birth. Date information is displayed using the
' WEEKDAY, DAY, MONTH, and YEAR functions.
 
' To try this example:
' 1. Choose New Project from the File menu
' 2. Copy the code example below to the code window
' 3. Press F5 to run the example
 
 CLS                                   ' Clear the screen
 OPTION BASE 1
 DIM DayOfWeek(7) AS STRING
 DIM MonthOfYear(12) AS STRING
 FOR I = 1 TO 7                        ' Initialize the arrays
         READ DayOfWeek(I)
 NEXT I
 FOR I = 1 TO 12
         READ MonthOfYear(I)
 NEXT I
 INPUT "Enter your birthdate as MM/DD/YYYY "; Birthdate$
 
' Convert input date to numbers and create a complete date string.
 BDateVal = DATEVALUE(Birthdate$)      ' Get the unique date value
 BDay$ = DayOfWeek$(WEEKDAY(BDateVal)) + " " + MonthOfYear$(MONTH(BDateVal))
 BDay$ = BDay$ + STR$(DAY(BDateVal)) + "," + STR$(YEAR(BDateVal))
 EDateVal = BDateVal - 14              ' Calculate a date 14 days earlier
 
' Put the date string together.
 EDay$ = DayOfWeek$(WEEKDAY(EDateVal)) + " " + MonthOfYear$(MONTH(EDateVal))
 EDay$ = EDay$ + STR$(DAY(EDateVal)) + "," + STR$(YEAR(EDateVal))
 LDateVal = BDateVal + 14              ' Calculate a date 14 days later
 
' Put the date string together.
 LDay$ = DayOfWeek$(WEEKDAY(LDateVal)) + " " + MonthOfYear$(MONTH(LDateVal))
 LDay$ = LDay$ + STR$(DAY(LDateVal)) + "," + STR$(YEAR(LDateVal))
 PRINT "You were born on "; BDay$; "." ' Display the results
 PRINT
 PRINT "What you may not have been able to immediately calculate was:"
 PRINT
 PRINT "Two weeks before your birth was "; EDay$; "."
 PRINT "Two weeks after your birth was "; LDay$; "."
 END
 
 DATA "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday"
 DATA "Friday", "Saturday"
 DATA "January", "February", "March", "April", "May", "June", "July"
 DATA "August", "September", "October", "November", "December"