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− | <div id="16SpaceContent" align="left"><div class="ZEditBox" align="justify"> | + | <div style="font-size:30px">'''FACTDOUBLE(Number)'''</div><br/> |
| + | *<math>Number</math> is a positive integer whose double factorial is to be found. |
| + | **FACTDOUBLE(), returns the double factorial of a number. |
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− | Syntax
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− | </div></div>
| + | == Description == |
− | ----
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− | <div id="4SpaceContent" align="left"><div class="ZEditBox" align="justify">
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− | Remarks
| + | FACTDOUBLE(Number) |
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− | </div></div>
| + | e.g. FACTDOUBLE(6) displays '''48''' as a result. |
− | ----
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− | <div id="2SpaceContent" align="left"><div class="ZEditBox" align="justify">
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− | Examples
| + | *<math>Number</math> should be a positive integer. |
| + | *The factorial of an even number is calculated as - |
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− | </div></div> | + | <math>N!! = N * (N-2) * (N-4) * .....4 * 2</math> |
− | ---- | + | *The factorial of an odd number is calculated as - |
− | <div id="8SpaceContent" align="left"><div class="ZEditBox" align="justify">'''<font face="Times New Roman">''''''''''''<font size="6"> </font>''' '''''''''</font>'''</div></div>
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− | ---- | |
− | <div id="11SpaceContent" align="left"><div class="ZEditBox mceEditable" align="justify">
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− | <font size="5">Description</font> | + | <math>N!! = N * (N-2) * (N-4) * .....3 * 1</math> |
| + | *If <math>Number</math> is negative, Calci displays #N/A error message. |
| + | *If <math>Number</math> is not an integer, it is truncated to calculate the double factorial. |
| + | *If <math>Number</math> is invalid, Calci displays #NULL error message. |
| + | *The double factorial of series of numbers can be calculated as - |
| + | e.g. FACTDOUBLE(1..5) calculates double factorial of numbers from 1 to 5 and displays result as '''1 2 3 8 15'''. |
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− | </div></div>
| + | == Examples == |
− | ----
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− | <div id="10SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify">'''<font face="Times New Roman"> <font size="6">FACTDOUBLE</font> </font>'''</div></div>
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− | ----
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− | <div id="3SpaceContent" class="zcontent" align="left"><br /><div id="7Space" class="gamizbox" title="7Space"><div id="7SpaceHeader" class="zheaderstyle" title="Double-click to start and stop editing the header."><center></center></div><div id="7SpaceRollup" title="Double-click to rolldown" align="left"><span><span id="7SpaceRollupContent" align="center"></span></span></div><div id="7SpaceCover"><div id="7SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"><font size="3"><font face="Times New Roman"> '''FACTDOUBLE'''('''numr''')
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− | Where num is the value to which double factorial is returned.
| + | <div id="6SpaceContent" class="zcontent" align="left"> |
| + | |
| + | {| id="TABLE3" class="SpreadSheet blue" |
| + | |- class="even" |
| + | | class=" " | '''Function''' |
| + | | class=" " | '''Output''' |
| + | |
| + | |- class="odd" |
| + | | class="sshl_f" |FACTDOUBLE(7) |
| + | | class="sshl_f" |105 |
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− | </font></font></div></div>
| + | |- class="even" |
− | ----
| + | | class="sshl_f" |FACTDOUBLE(0) |
− | <div id="13SpaceContent" class="zcontent" align="left"><br /><br /><div id="1Space" class="gamizbox" title="1Space"><div id="1SpaceHeader" class="zheaderstyle" title="Double-click to start and stop editing the header."><center></center></div><div id="1SpaceRollup" title="Double-click to rolldown" align="left"><span><span id="1SpaceRollupContent" align="center"></span></span></div><div id="1SpaceCover"><div id="1SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify">
| + | | class="sshl_f" |1 |
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− | · FACTDOUBLE returns the error value when number is nonnumeric or negative
| + | |- class="odd" |
| + | | class="sshl_f" |FACTDOUBLE(4.2) |
| + | | class="sshl_f" |8 |
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− | <font size="3"><font face="Times New Roman"> </font></font>
| + | |- class="even" |
| + | | class="sshl_f" |FACTDOUBLE(8) |
| + | | class="sshl_f" |384 |
| + | |} |
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− | Formula:-
| + | ==Related Videos== |
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− | · If number is even, the following formula is to be used
| + | {{#ev:youtube|v=XbFpuC86ouQ|280|center|FACTDOUBLE}} |
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− | If number is odd:
| + | == See Also == |
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− | </div></div>
| + | *[[Manuals/calci/FACT | FACT]] |
− | ----
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− | <div id="14SpaceContent" class="zcontent" align="left"><br /><br /><br /><div id="5Space" class="gamizbox" title="5Space"><div id="5SpaceHeader" class="zheaderstyle" title="Double-click to start and stop editing the header."><center></center></div><div id="5SpaceRollup" title="Double-click to rolldown" align="left"><span><span id="5SpaceRollupContent" align="center"></span></span></div><div id="5SpaceCover"><div id="5SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify">It calculates the double factorial of a number.</div></div>
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− | ----
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− | <div id="12SpaceContent" class="zcontent" align="left"><br /><br /><br /><div id="9Space" class="gamizbox" title="9Space"><div id="9SpaceHeader" class="zheaderstyle" title="Double-click to start and stop editing the header."><center></center></div><div id="9SpaceRollup" title="Double-click to rolldown" align="left"><span><span id="9SpaceRollupContent" align="center"></span></span></div><div id="9SpaceCover"><div id="9SpaceContent" class="zcontent" align="left"><div class="ZEditBox" align="justify"><font size="3"><font face="Times New Roman">
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− | Lets see an example in (Column1, Row 1)
| + | ==References== |
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− | FACTDOUBLE (numr)
| + | *[http://en.wikipedia.org/wiki/Double_factorial Double Factorial] |
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− | FACTDOUBLE (C1R1)''''''
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− | That is FACTDOUBLE (9) is 945
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− | </font></font></div></div>
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− | ----
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− | <div id="6SpaceContent" class="zcontent" align="left">
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− | {| id="TABLE3" class="SpreadSheet blue"
| + | *[[Z_API_Functions | List of Main Z Functions]] |
− | |- class="even"
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− | | class=" " |
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− | <div id="6Space_Copy" title="Click and Drag over to AutoFill other cells."></div>
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− | | Column1
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− | | class=" " | Column2
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− | | class=" " | Column3
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− | | class=" " | Column4
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− | |- class="odd"
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− | | class=" " | Row1
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− | | class=" sshl_f " | 9
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− | | class="sshl_f" | 945
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |- class="even"
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− | | class=" " | Row2
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− | | class="sshl_f" |
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− | | class="sshl_f SelectTD SelectTD" |
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− | <div id="6Space_Handle" title="Click and Drag to resize CALCI Column/Row/Cell. It is EZ!"></div><div id="6Space_Copy" title="Click and Drag over to AutoFill other cells."></div>
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |- class="odd"
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− | | Row3
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |- class="even"
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− | | Row4
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |- class="odd"
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− | | class=" " | Row5
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |- class="even"
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− | | Row6
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | | class="sshl_f" |
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− | |}
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− | <div align="left">[[Image:calci1.gif]]</div></div>
| + | *[[ Z3 | Z3 home ]] |
− | ----
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− | </div></div></div></div></div></div></div></div></div></div></div></div>
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