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28<meta>
29<topic id="textscalc0104060111xml" indexer="include">
30<title id="tit" xml-lang="en-US">Add-in Functions</title>
31<filename>/text/scalc/01/04060111.xhp</filename>
32</topic>
33</meta>
34<body>
35<bookmark xml-lang="en-US" branch="index" id="bm_id3150870"><bookmark_value>add-ins; functions</bookmark_value>
36<bookmark_value>functions; add-in functions</bookmark_value>
37<bookmark_value>Function Wizard; add-ins</bookmark_value>
38</bookmark>
39<paragraph role="heading" id="hd_id3150870" xml-lang="en-US" level="1" l10n="U" oldref="1">Add-in Functions</paragraph>
40<paragraph role="paragraph" id="par_id3147427" xml-lang="en-US" l10n="CHG" oldref="2"><variable id="addintext">The following describes and lists some of the available add-in functions.
41</variable></paragraph>
42<paragraph role="paragraph" id="par_id3163713" xml-lang="en-US" l10n="U" oldref="75"><link href="text/scalc/01/04060112.xhp#addinconcept">Add-in concept</link></paragraph>
43<paragraph role="paragraph" id="par_id3146120" xml-lang="en-US" l10n="U" oldref="5">You will also find a <link href="text/scalc/01/04060112.xhp">description of the $[officename] Calc add-in interface</link> in the Help. In addition, important functions and their parameters are described in the Help for the <switchinline select="sys"><caseinline select="UNIX">Shared Library
44</caseinline><defaultinline>$[officename] Calc add-in DLL</defaultinline></switchinline>.</paragraph>
45<paragraph role="heading" id="hd_id3151075" xml-lang="en-US" level="2" l10n="U" oldref="7">Add-ins supplied</paragraph>
46<paragraph role="paragraph" id="par_id3156285" xml-lang="en-US" l10n="CHG" oldref="8">$[officename] contains examples for the add-in interface of $[officename] Calc.</paragraph>
47<paragraph role="paragraph" id="par_id3159267" xml-lang="en-US" l10n="U" oldref="76"><link href="text/scalc/01/04060115.xhp">Analysis Functions Part One</link></paragraph>
48<paragraph role="paragraph" id="par_id3154703" xml-lang="en-US" l10n="U" oldref="77"><link href="text/scalc/01/04060116.xhp">Analysis Functions Part Two</link></paragraph>
49<sort order="asc">
50<section id="isleapyear">
51<bookmark xml-lang="en-US" branch="index" id="bm_id3149566"><bookmark_value>ISLEAPYEAR function</bookmark_value>
52<bookmark_value>leap year determination</bookmark_value>
53</bookmark><comment>mw added one entry</comment>
54<paragraph role="heading" id="hd_id3149566" xml-lang="en-US" level="2" l10n="U" oldref="14">ISLEAPYEAR</paragraph>
55<paragraph role="paragraph" id="par_id3150297" xml-lang="en-US" l10n="U" oldref="15"><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>
56<paragraph role="heading" id="hd_id3148487" xml-lang="en-US" level="3" l10n="U" oldref="16">Syntax</paragraph>
57<paragraph role="code" id="par_id3150205" xml-lang="en-US" l10n="U" oldref="17">ISLEAPYEAR("Date")</paragraph>
58<paragraph role="paragraph" id="par_id3159239" xml-lang="en-US" l10n="U" oldref="18">
59<emph>Date</emph> specifies whether a given date falls within a leap year. The Date parameter must be a valid date according to the locale settings of %PRODUCTNAME.</paragraph>
60<paragraph role="heading" id="hd_id3149817" xml-lang="en-US" level="3" l10n="U" oldref="19">Example</paragraph>
61<paragraph role="paragraph" id="par_id3150786" xml-lang="en-US" l10n="CHG" oldref="20">=ISLEAPYEAR(A1) returns 1, if A1 contains 1968-02-29, the valid date 29th of February 1968 in your locale setting.</paragraph>
62<paragraph role="paragraph" id="par_idN107E7" xml-lang="en-US" l10n="CHG">You may also use =ISLEAPYEAR("1968-02-29") or =ISLEAPYEAR("2/29/68").</paragraph>
63<paragraph role="paragraph" id="par_idN107EA" xml-lang="en-US" l10n="CHG">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>
64</section>
65<section id="years">
66<bookmark xml-lang="en-US" branch="index" id="bm_id3154656"><bookmark_value>YEARS function</bookmark_value>
67<bookmark_value>number of years between two dates</bookmark_value>
68</bookmark><comment>mw added one entry</comment>
69<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFYEARS" id="bm_id3150368" localize="false"/>
70<paragraph role="heading" id="hd_id3154656" xml-lang="en-US" level="2" l10n="U" oldref="21">YEARS</paragraph>
71<paragraph role="paragraph" id="par_id3150886" xml-lang="en-US" l10n="U" oldref="22"><ahelp hid="HID_DAI_FUNC_DIFFYEARS">Calculates the difference in years between two dates.</ahelp></paragraph>
72<paragraph role="heading" id="hd_id3154370" xml-lang="en-US" level="3" l10n="U" oldref="23">Syntax</paragraph>
73<paragraph role="code" id="par_id3146114" xml-lang="en-US" l10n="U" oldref="24">YEARS(StartDate; EndDate; Type)</paragraph>
74<paragraph role="paragraph" id="par_id3145387" xml-lang="en-US" l10n="U" oldref="25">
75<emph>StartDate</emph> is the first date</paragraph>
76<paragraph role="paragraph" id="par_id3156290" xml-lang="en-US" l10n="U" oldref="26">
77<emph>EndDate</emph> is the second date</paragraph>
78<paragraph role="paragraph" id="par_id3152893" xml-lang="en-US" l10n="U" oldref="27">
79<emph>Type</emph> calculates the type of difference. Possible values are 0 (interval) and 1 (in calendar years).</paragraph>
80</section>
81<section id="months">
82<bookmark xml-lang="en-US" branch="index" id="bm_id3152898"><bookmark_value>MONTHS function</bookmark_value>
83<bookmark_value>number of months between two dates</bookmark_value>
84</bookmark><comment>mw added one entry</comment>
85<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFMONTHS" id="bm_id3148839" localize="false"/>
86<paragraph role="heading" id="hd_id3152898" xml-lang="en-US" level="2" l10n="U" oldref="28">MONTHS</paragraph>
87<paragraph role="paragraph" id="par_id3153066" xml-lang="en-US" l10n="U" oldref="29"><ahelp hid="HID_DAI_FUNC_DIFFMONTHS">Calculates the difference in months between two dates.</ahelp></paragraph>
88<paragraph role="heading" id="hd_id3151240" xml-lang="en-US" level="3" l10n="U" oldref="30">Syntax</paragraph>
89<paragraph role="code" id="par_id3146869" xml-lang="en-US" l10n="U" oldref="31">MONTHS(StartDate; EndDate; Type)</paragraph>
90<paragraph role="paragraph" id="par_id3145075" xml-lang="en-US" l10n="U" oldref="32">
91<emph>StartDate</emph> is the first date</paragraph>
92<paragraph role="paragraph" id="par_id3157981" xml-lang="en-US" l10n="U" oldref="33">
93<emph>EndDate</emph> is the second date</paragraph>
94<paragraph role="paragraph" id="par_id3150111" xml-lang="en-US" l10n="U" oldref="34">
95<emph>Type</emph> calculates the type of difference. Possible values include 0 (interval) and 1 (in calendar months).</paragraph>
96</section>
97<section id="rot13">
98<bookmark xml-lang="en-US" branch="index" id="bm_id3159094"><bookmark_value>ROT13 function</bookmark_value>
99<bookmark_value>encrypting text</bookmark_value>
100</bookmark><comment>mw added one entry</comment>
101<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_ROT13" id="bm_id3153283" localize="false"/>
102<paragraph role="heading" id="hd_id3159094" xml-lang="en-US" level="2" l10n="U" oldref="35">ROT13</paragraph>
103<paragraph role="paragraph" id="par_id3146781" xml-lang="en-US" l10n="U" oldref="36"><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>
104<paragraph role="heading" id="hd_id3150893" xml-lang="en-US" level="3" l10n="U" oldref="37">Syntax</paragraph>
105<paragraph role="code" id="par_id3159205" xml-lang="en-US" l10n="U" oldref="38">ROT13(Text)</paragraph>
106<paragraph role="paragraph" id="par_id3153249" xml-lang="en-US" l10n="U" oldref="39">
107<emph>Text</emph> is the character string to be encrypted. ROT13(ROT13(Text)) decrypts the code.</paragraph>
108</section>
109<section id="daysinyear">
110<bookmark xml-lang="en-US" branch="index" id="bm_id3151300"><bookmark_value>DAYSINYEAR function</bookmark_value>
111<bookmark_value>number of days; in a specific year</bookmark_value>
112</bookmark><comment>mw added one entry</comment>
113<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DAYSINYEAR" id="bm_id3153972" localize="false"/>
114<paragraph role="heading" id="hd_id3151300" xml-lang="en-US" level="2" l10n="U" oldref="43">DAYSINYEAR</paragraph>
115<paragraph role="paragraph" id="par_id3143220" xml-lang="en-US" l10n="CHG" oldref="44"><ahelp hid="HID_DAI_FUNC_DAYSINYEAR">Calculates the number of days of the year in which the date entered occurs.</ahelp></paragraph>
116<paragraph role="heading" id="hd_id3145358" xml-lang="en-US" level="3" l10n="U" oldref="45">Syntax</paragraph>
117<paragraph role="code" id="par_id3154651" xml-lang="en-US" l10n="U" oldref="46">DAYSINYEAR(Date)</paragraph>
118<paragraph role="paragraph" id="par_id3153803" xml-lang="en-US" l10n="CHG" oldref="47">
119<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>
120<paragraph role="heading" id="hd_id3153487" xml-lang="en-US" level="3" l10n="U" oldref="48">Example</paragraph>
121<paragraph role="paragraph" id="par_id3153811" xml-lang="en-US" l10n="CHG" oldref="49">=DAYSINYEAR(A1) returns 366 days if A1 contains 1968-02-29, a valid date for the year 1968.</paragraph>
122</section>
123<section id="daysinmonth">
124<bookmark xml-lang="en-US" branch="index" id="bm_id3154737"><bookmark_value>DAYSINMONTH function</bookmark_value>
125<bookmark_value>number of days;in a specific month of a year</bookmark_value>
126</bookmark><comment>mw added one entry</comment>
127<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DAYSINMONTH" id="bm_id3155593" localize="false"/>
128<paragraph role="heading" id="hd_id3154737" xml-lang="en-US" level="2" l10n="U" oldref="50">DAYSINMONTH</paragraph>
129<paragraph role="paragraph" id="par_id3149316" xml-lang="en-US" l10n="CHG" oldref="51"><ahelp hid="HID_DAI_FUNC_DAYSINMONTH">Calculates the number of days of the month in which the date entered occurs.</ahelp></paragraph>
130<paragraph role="heading" id="hd_id3145114" xml-lang="en-US" level="3" l10n="U" oldref="52">Syntax</paragraph>
131<paragraph role="code" id="par_id3150955" xml-lang="en-US" l10n="U" oldref="53">DAYSINMONTH(Date)</paragraph>
132<paragraph role="paragraph" id="par_id3147501" xml-lang="en-US" l10n="CHG" oldref="54">
133<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>
134<paragraph role="heading" id="hd_id3149871" xml-lang="en-US" level="3" l10n="U" oldref="55">Example</paragraph>
135<paragraph role="paragraph" id="par_id3155742" xml-lang="en-US" l10n="CHG" oldref="56">=DAYSINMONTH(A1) returns 29 days if A1 contains 1968-02-17, a valid date for February 1968.</paragraph>
136</section>
137<section id="weeks">
138<bookmark xml-lang="en-US" branch="index" id="bm_id3149048"><bookmark_value>WEEKS function</bookmark_value>
139<bookmark_value>number of weeks;between two dates</bookmark_value>
140</bookmark><comment>mw added one entry</comment>
141<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_DIFFWEEKS" id="bm_id3150435" localize="false"/>
142<paragraph role="heading" id="hd_id3149048" xml-lang="en-US" level="2" l10n="U" oldref="57">WEEKS</paragraph>
143<paragraph role="paragraph" id="par_id3153340" xml-lang="en-US" l10n="U" oldref="58"><ahelp hid="HID_DAI_FUNC_DIFFWEEKS">Calculates the difference in weeks between two dates.</ahelp></paragraph>
144<paragraph role="heading" id="hd_id3150393" xml-lang="en-US" level="3" l10n="U" oldref="59">Syntax</paragraph>
145<paragraph role="code" id="par_id3147402" xml-lang="en-US" l10n="U" oldref="60">WEEKS(StartDate; EndDate; Type)</paragraph>
146<paragraph role="paragraph" id="par_id3151387" xml-lang="en-US" l10n="U" oldref="61">
147<emph>StartDate</emph> is the first date</paragraph>
148<paragraph role="paragraph" id="par_id3146324" xml-lang="en-US" l10n="U" oldref="62">
149<emph>EndDate</emph> is the second date</paragraph>
150<paragraph role="paragraph" id="par_id3166467" xml-lang="en-US" l10n="U" oldref="63">
151<emph>Type</emph> calculates the type of difference. The possible values are 0 (interval) and 1 (in numbers of weeks).</paragraph>
152</section>
153<section id="weeksinyear">
154<bookmark xml-lang="en-US" branch="index" id="bm_id3145237"><bookmark_value>WEEKSINYEAR function</bookmark_value>
155<bookmark_value>number of weeks;in a specific year</bookmark_value>
156</bookmark><comment>mw added one entry</comment>
157<bookmark xml-lang="en-US" branch="hid/SC_HID_DAI_FUNC_WEEKSINYEAR" id="bm_id3146883" localize="false"/>
158<paragraph role="heading" id="hd_id3145237" xml-lang="en-US" level="2" l10n="U" oldref="64">WEEKSINYEAR</paragraph>
159<paragraph role="paragraph" id="par_id3147410" xml-lang="en-US" l10n="CHG" oldref="65"><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>
160<paragraph role="heading" id="hd_id3149719" xml-lang="en-US" level="3" l10n="U" oldref="66">Syntax</paragraph>
161<paragraph role="code" id="par_id3145638" xml-lang="en-US" l10n="U" oldref="67">WEEKSINYEAR(Date)</paragraph>
162<paragraph role="paragraph" id="par_id3149946" xml-lang="en-US" l10n="CHG" oldref="68">
163<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>
164<paragraph role="heading" id="hd_id3150037" xml-lang="en-US" level="3" l10n="U" oldref="69">Example</paragraph>
165<paragraph role="paragraph" id="par_id3147614" xml-lang="en-US" l10n="CHG" oldref="70">WEEKSINYEAR(A1) returns 53 if A1 contains 1970-02-17, a valid date for the year 1970.</paragraph>
166</section>
167</sort>
168<paragraph role="heading" id="hd_id3157901" xml-lang="en-US" level="2" l10n="U" oldref="72">Add-ins through %PRODUCTNAME API</paragraph>
169<paragraph role="paragraph" id="par_id3149351" xml-lang="en-US" l10n="U" oldref="73">Add-ins can also be implemented through the %PRODUCTNAME <link href="https://api.openoffice.org/">API</link>.</paragraph>
170<section id="relatedtopics">
171<embed href="text/scalc/01/04060100.xhp#drking"/>
172</section>
173</body>
174</helpdocument>
175