/text/scalc/01/04060111.xhp add-ins; functions functions; add-in functions Function Wizard; add-ins Add-in Functions The following describes and lists some of the available add-in functions. Add-in concept You will also find a description of the $[officename] Calc add-in interface in the Help. In addition, important functions and their parameters are described in the Help for the Shared Library $[officename] Calc add-in DLL. Add-ins supplied $[officename] contains examples for the add-in interface of $[officename] Calc. Analysis Functions Part One Analysis Functions Part Two

ISLEAPYEAR function leap year determination mw added one entry ISLEAPYEAR Determines whether a year is a leap year. If yes, the function will return the value 1 (TRUE); if not, it will return 0 (FALSE). ISLEAPYEAR(Date) Date specifies whether a given date falls within a leap year. The Date parameter must be a valid date. =ISLEAPYEAR(A1) returns 1, if A1 contains 1968-02-29, the valid date 29th of February 1968 in your locale setting. You may also use =ISLEAPYEAR(DATE(1968;2;29)) or =ISLEAPYEAR("1968-02-29") giving the date string in the ISO 8601 notation. Never use =ISLEAPYEAR(2/29/68), because this would first evaluate 2 divided by 29 divided by 68, and then calculate the ISLEAPYEAR function from this small number as a serial date number.

YEARS function number of years between two dates mw added one entry YEARS Calculates the difference in years between two dates. YEARS(StartDate; EndDate; Type) StartDate is the first date EndDate is the second date Type calculates the type of difference. Possible values are 0 (interval) and 1 (in calendar years).

MONTHS function number of months between two dates mw added one entry MONTHS Calculates the difference in months between two dates. MONTHS(StartDate; EndDate; Type) StartDate is the first date EndDate is the second date Type calculates the type of difference. Possible values include 0 (interval) and 1 (in calendar months).

ROT13 function encrypting text mw added one entry ROT13 Encrypts a character string by moving the characters 13 positions in the alphabet. After the letter Z, the alphabet begins again (Rotation). By applying the encryption function again to the resulting code, you can decrypt the text. ROT13(Text) Text is the character string to be encrypted. ROT13(ROT13(Text)) decrypts the code.

DAYSINYEAR function number of days; in a specific year mw added one entry DAYSINYEAR Calculates the number of days of the year in which the date entered occurs. DAYSINYEAR(Date) Date is any date in the respective year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME. =DAYSINYEAR(A1) returns 366 days if A1 contains 1968-02-29, a valid date for the year 1968.

DAYSINMONTH function number of days;in a specific month of a year mw added one entry DAYSINMONTH Calculates the number of days of the month in which the date entered occurs. DAYSINMONTH(Date) Date is any date in the respective month of the desired year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME. =DAYSINMONTH(A1) returns 29 days if A1 contains 1968-02-17, a valid date for February 1968.

WEEKS function number of weeks;between two dates mw added one entry WEEKS Calculates the difference in weeks between two dates. WEEKS(StartDate; EndDate; Type) StartDate is the first date EndDate is the second date Type calculates the type of difference. The possible values are 0 (interval) and 1 (in numbers of weeks).

WEEKSINYEAR function number of weeks;in a specific year mw added one entry WEEKSINYEAR Calculates the number of weeks of the year in which the date entered occurs. The number of weeks is defined as follows: a week that spans two years is added to the year in which most days of that week occur. WEEKSINYEAR(Date) Date is any date in the respective year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME. WEEKSINYEAR(A1) returns 53 if A1 contains 1970-02-17, a valid date for the year 1970.

Add-ins through %PRODUCTNAME API Add-ins can also be implemented through the %PRODUCTNAME API.