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<?xml version="1.0" encoding="UTF-8"?>
<helpdocument version="1.0">
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<meta>
<topic id="textscalc0104060111xml" indexer="include">
<title id="tit" xml-lang="en-US">Add-in Functions</title>
<filename>/text/scalc/01/04060111.xhp</filename>
</topic>
</meta>
<body>
<bookmark xml-lang="en-US" branch="index" id="bm_id3150870"><bookmark_value>add-ins; functions</bookmark_value>
<bookmark_value>functions; add-in functions</bookmark_value>
<bookmark_value>Function Wizard; add-ins</bookmark_value>
</bookmark>
<paragraph role="heading" id="hd_id3150870" xml-lang="en-US" level="1"><variable id="head_addin"><link href="text/scalc/01/04060111.xhp" name="Add-in Functions">Add-in Functions</link></variable></paragraph>
<paragraph role="paragraph" id="par_id3147427" xml-lang="en-US"><variable id="addintext">The following describes and lists some of the available add-in functions.
</variable></paragraph>
<paragraph role="paragraph" id="par_id3163713" xml-lang="en-US"><link href="text/scalc/01/04060112.xhp#addinconcept">Add-in concept</link></paragraph>
<paragraph role="paragraph" id="par_id3146120" xml-lang="en-US">You will also find a <link href="text/scalc/01/04060112.xhp">description of the $[officename] Calc add-in interface</link> in the Help. In addition, important functions and their parameters are described in the Help for the <switchinline select="sys"><caseinline select="UNIX">Shared Library
</caseinline><defaultinline>$[officename] Calc add-in DLL</defaultinline></switchinline>.</paragraph>
<paragraph role="heading" id="hd_id3151075" xml-lang="en-US" level="2">Add-ins supplied</paragraph>
<paragraph role="paragraph" id="par_id3156285" xml-lang="en-US">$[officename] contains examples for the add-in interface of $[officename] Calc.</paragraph>
<paragraph role="paragraph" id="par_id3159267" xml-lang="en-US"><link href="text/scalc/01/04060115.xhp">Analysis Functions Part One</link></paragraph>
<paragraph role="paragraph" id="par_id3154703" xml-lang="en-US"><link href="text/scalc/01/04060116.xhp">Analysis Functions Part Two</link></paragraph>
<sort order="asc">
<section id="isleapyear">
<bookmark xml-lang="en-US" branch="index" id="bm_id3149566"><bookmark_value>ISLEAPYEAR function</bookmark_value>
<bookmark_value>leap year determination</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<paragraph role="heading" id="hd_id3149566" xml-lang="en-US" level="2">ISLEAPYEAR</paragraph>
<paragraph role="paragraph" id="par_id3150297" xml-lang="en-US"><ahelp hid=".">Determines whether a year is a leap year.</ahelp> If yes, the function will return the value 1 (TRUE); if not, it will return 0 (FALSE).</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3150205" xml-lang="en-US">ISLEAPYEAR(Date)</paragraph>
<paragraph role="paragraph" id="par_id3159239" xml-lang="en-US">
<emph>Date</emph> specifies whether a given date falls within a leap year. The Date parameter must be a valid date.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionexample"/>
<paragraph role="paragraph" id="par_id3150786" xml-lang="en-US">=ISLEAPYEAR(A1) returns 1, if A1 contains 1968-02-29, the valid date 29th of February 1968 in your locale setting.</paragraph>
<paragraph role="paragraph" id="par_idN107E7" xml-lang="en-US">You may also use =ISLEAPYEAR(DATE(1968;2;29)) or =ISLEAPYEAR("1968-02-29") giving the date string in the ISO 8601 notation.</paragraph>
<paragraph role="paragraph" id="par_idN107EA" xml-lang="en-US">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.</paragraph>
</section>
<section id="years">
<bookmark xml-lang="en-US" branch="index" id="bm_id3154656"><bookmark_value>YEARS function</bookmark_value>
<bookmark_value>number of years between two dates</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFYEARS" id="bm_id3150368" localize="false"/>
<paragraph role="heading" id="hd_id3154656" xml-lang="en-US" level="2">YEARS</paragraph>
<paragraph role="paragraph" id="par_id3150886" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_DIFFYEARS">Calculates the difference in years between two dates.</ahelp></paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3146114" xml-lang="en-US">YEARS(StartDate; EndDate; Type)</paragraph>
<paragraph role="paragraph" id="par_id3145387" xml-lang="en-US">
<emph>StartDate</emph> is the first date</paragraph>
<paragraph role="paragraph" id="par_id3156290" xml-lang="en-US">
<emph>EndDate</emph> is the second date</paragraph>
<paragraph role="paragraph" id="par_id3152893" xml-lang="en-US">
<emph>Type</emph> calculates the type of difference. Possible values are 0 (interval) and 1 (in calendar years).</paragraph>
</section>
<section id="months">
<bookmark xml-lang="en-US" branch="index" id="bm_id3152898"><bookmark_value>MONTHS function</bookmark_value>
<bookmark_value>number of months between two dates</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFMONTHS" id="bm_id3148839" localize="false"/>
<paragraph role="heading" id="hd_id3152898" xml-lang="en-US" level="2">MONTHS</paragraph>
<paragraph role="paragraph" id="par_id3153066" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_DIFFMONTHS">Calculates the difference in months between two dates.</ahelp></paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3146869" xml-lang="en-US">MONTHS(StartDate; EndDate; Type)</paragraph>
<paragraph role="paragraph" id="par_id3145075" xml-lang="en-US">
<emph>StartDate</emph> is the first date</paragraph>
<paragraph role="paragraph" id="par_id3157981" xml-lang="en-US">
<emph>EndDate</emph> is the second date</paragraph>
<paragraph role="paragraph" id="par_id3150111" xml-lang="en-US">
<emph>Type</emph> calculates the type of difference. Possible values include 0 (interval) and 1 (in calendar months).</paragraph>
</section>
<section id="rot13">
<bookmark xml-lang="en-US" branch="index" id="bm_id3159094"><bookmark_value>ROT13 function</bookmark_value>
<bookmark_value>encrypting text</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_ROT13" id="bm_id3153283" localize="false"/>
<paragraph role="heading" id="hd_id3159094" xml-lang="en-US" level="2">ROT13</paragraph>
<paragraph role="paragraph" id="par_id3146781" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_ROT13">Encrypts a character string by moving the characters 13 positions in the alphabet.</ahelp> After the letter Z, the alphabet begins again (Rotation). By applying the encryption function again to the resulting code, you can decrypt the text.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3159205" xml-lang="en-US">ROT13(Text)</paragraph>
<paragraph role="paragraph" id="par_id3153249" xml-lang="en-US">
<emph>Text</emph> is the character string to be encrypted. ROT13(ROT13(Text)) decrypts the code.</paragraph>
</section>
<section id="daysinyear">
<bookmark xml-lang="en-US" branch="index" id="bm_id3151300"><bookmark_value>DAYSINYEAR function</bookmark_value>
<bookmark_value>number of days; in a specific year</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DAYSINYEAR" id="bm_id3153972" localize="false"/>
<paragraph role="heading" id="hd_id3151300" xml-lang="en-US" level="2">DAYSINYEAR</paragraph>
<paragraph role="paragraph" id="par_id3143220" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_DAYSINYEAR">Calculates the number of days of the year in which the date entered occurs.</ahelp></paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3154651" xml-lang="en-US">DAYSINYEAR(Date)</paragraph>
<paragraph role="paragraph" id="par_id3153803" xml-lang="en-US">
<emph>Date</emph> is any date in the respective year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionexample"/>
<paragraph role="paragraph" id="par_id3153811" xml-lang="en-US">=DAYSINYEAR(A1) returns 366 days if A1 contains 1968-02-29, a valid date for the year 1968.</paragraph>
</section>
<section id="daysinmonth">
<bookmark xml-lang="en-US" branch="index" id="bm_id3154737"><bookmark_value>DAYSINMONTH function</bookmark_value>
<bookmark_value>number of days;in a specific month of a year</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DAYSINMONTH" id="bm_id3155593" localize="false"/>
<paragraph role="heading" id="hd_id3154737" xml-lang="en-US" level="2">DAYSINMONTH</paragraph>
<paragraph role="paragraph" id="par_id3149316" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_DAYSINMONTH">Calculates the number of days of the month in which the date entered occurs.</ahelp></paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3150955" xml-lang="en-US">DAYSINMONTH(Date)</paragraph>
<paragraph role="paragraph" id="par_id3147501" xml-lang="en-US">
<emph>Date</emph> 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.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionexample"/>
<paragraph role="paragraph" id="par_id3155742" xml-lang="en-US">=DAYSINMONTH(A1) returns 29 days if A1 contains 1968-02-17, a valid date for February 1968.</paragraph>
</section>
<section id="weeks">
<bookmark xml-lang="en-US" branch="index" id="bm_id3149048"><bookmark_value>WEEKS function</bookmark_value>
<bookmark_value>number of weeks;between two dates</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFWEEKS" id="bm_id3150435" localize="false"/>
<paragraph role="heading" id="hd_id3149048" xml-lang="en-US" level="2">WEEKS</paragraph>
<paragraph role="paragraph" id="par_id3153340" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_DIFFWEEKS">Calculates the difference in weeks between two dates.</ahelp></paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3147402" xml-lang="en-US">WEEKS(StartDate; EndDate; Type)</paragraph>
<paragraph role="paragraph" id="par_id3151387" xml-lang="en-US">
<emph>StartDate</emph> is the first date</paragraph>
<paragraph role="paragraph" id="par_id3146324" xml-lang="en-US">
<emph>EndDate</emph> is the second date</paragraph>
<paragraph role="paragraph" id="par_id3166467" xml-lang="en-US">
<emph>Type</emph> calculates the type of difference. The possible values are 0 (interval) and 1 (in numbers of weeks).</paragraph>
</section>
<section id="weeksinyear">
<bookmark xml-lang="en-US" branch="index" id="bm_id3145237"><bookmark_value>WEEKSINYEAR function</bookmark_value>
<bookmark_value>number of weeks;in a specific year</bookmark_value>
</bookmark><comment>mw added one entry</comment>
<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_WEEKSINYEAR" id="bm_id3146883" localize="false"/>
<paragraph role="heading" id="hd_id3145237" xml-lang="en-US" level="2">WEEKSINYEAR</paragraph>
<paragraph role="paragraph" id="par_id3147410" xml-lang="en-US"><ahelp hid="HID_DAI_FUNC_WEEKSINYEAR">Calculates the number of weeks of the year in which the date entered occurs.</ahelp> 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.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionsyntax"/>
<paragraph role="code" id="par_id3145638" xml-lang="en-US">WEEKSINYEAR(Date)</paragraph>
<paragraph role="paragraph" id="par_id3149946" xml-lang="en-US">
<emph>Date</emph> is any date in the respective year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME.</paragraph>
<embed href="text/scalc/01/common_func.xhp#sectionexample"/>
<paragraph role="paragraph" id="par_id3147614" xml-lang="en-US">WEEKSINYEAR(A1) returns 53 if A1 contains 1970-02-17, a valid date for the year 1970.</paragraph>
</section>
</sort>
<paragraph role="heading" id="hd_id3157901" xml-lang="en-US" level="2">Add-ins through %PRODUCTNAME API</paragraph>
<paragraph role="paragraph" id="par_id3149351" xml-lang="en-US">Add-ins can also be implemented through the %PRODUCTNAME <link href="https://api.libreoffice.org/" name="api.libreoffice.org">API</link>.</paragraph>
<section id="relatedtopics">
<embed href="text/scalc/01/04060100.xhp#drking"/>
</section>
</body>
</helpdocument>
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