writer
2,661
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − <div id="16SpaceContent" align="left"><div class="ZEditBox" align="justify">+ − Syntax+ − </div></div>+ − ---- − <div id="4SpaceContent" align="left"><div class="ZEditBox" align="justify"> − Remarks+ − </div></div>+ − ---- − <div id="2SpaceContent" align="left"><div class="ZEditBox" align="justify"> − Examples+ − + − + − <div id="8SpaceContent" align="left"><div class="ZEditBox" align="justify">'''<font face="Times New Roman">''''''''''''<font size="6"> </font>''' '''''''''</font>'''</div></div> − ---- − <div id="11SpaceContent" align="left"><div class="ZEditBox mceEditable" align="justify"> − + + − + − + − <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>+ − ----+ − + + − Where num is the value to which double factorial is returned.+ − </font></font></div></div> − ---- − <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"> − − · FACTDOUBLE returns the error value when number is nonnumeric or negative − − <font size="3"><font face="Times New Roman"> </font></font> − − Formula:- − − · If number is even, the following formula is to be used − − If number is odd: − − </div></div> − ---- − <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> − ---- − <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"> − − Lets see an example in (Column1, Row 1) − − FACTDOUBLE (numr) − − FACTDOUBLE (C1R1)'''''' − − That is FACTDOUBLE (9) is 945 − − </font></font></div></div> − ---- − | class=" " |+ − <div id="6Space_Copy" title="Click and Drag over to AutoFill other cells."></div>+ − | Column1+ − − − | class=" " | Column4 − | class=" " | Row1+ − | class=" sshl_f " | 9+ − + − − | class="sshl_f" | − | class=" " | Row2+ − + − + − <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> − | class="sshl_f" | − | class="sshl_f" | − | Row3+ − | class="sshl_f" |+ − | class="sshl_f" |+ − | class="sshl_f" | − | class="sshl_f" | − |- class="even" − | Row4 − | class="sshl_f" | − | class="sshl_f" | − − − |- class="odd" − | class=" " | Row5 − | class="sshl_f" | − | class="sshl_f" | − | class="sshl_f" | − | class="sshl_f" | − | Row6+ − | class="sshl_f" |+ − | class="sshl_f" | − − − <div align="left">[[Image:calci1.gif]]</div></div>+ − ----+ − </div></div></div></div></div></div></div></div></div></div></div></div>+ + + + +
Manuals/calci/FACTDOUBLE (view source)
Revision as of 23:39, 11 January 2014
, 23:39, 11 January 2014no edit summary
=FACTDOUBLE(N)=
*where, <math>N</math> is a positive integer whose double factorial is to be found.
FACTDOUBLE() calculates the double factorial of a number.
== Description ==
FACTDOUBLE(N)
e.g. FACTDOUBLE(6) displays '''48''' as a result.
</div></div>
*<math>N</math> should be a positive integer.
----
*The factorial of an even number is calculated as -
<font size="5">Description</font>
<math>N!! = N * (N-2) * (N-4) * .....4 * 2</math>
*The factorial of an odd number is calculated as -
</div></div>
<math>N!! = N * (N-2) * (N-4) * .....3 * 1</math>
----
*If <math>N</math> is negative, Calci displays #N/A error message.
*If <math>N</math> is not an integer, it is truncated to calculate the double factorial.
*If <math>N</math> is invalid, Calci displays #NULL error message.
<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''')
*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'''.
== Examples ==
<div id="6SpaceContent" class="zcontent" align="left">
<div id="6SpaceContent" class="zcontent" align="left">
{| id="TABLE3" class="SpreadSheet blue"
{| id="TABLE3" class="SpreadSheet blue"
|- class="even"
|- class="even"
| class=" " | '''Function'''
| class=" " | '''Output'''
| class=" " | Column2
| class=" " | Column3
|- class="odd"
|- class="odd"
| class="sshl_f" |FACTDOUBLE(7)
| class="sshl_f" |105
| class="sshl_f" | 945
| class="sshl_f" |
|- class="even"
|- class="even"
| class="sshl_f" |FACTDOUBLE(0)
| class="sshl_f" |
| class="sshl_f" |1
| class="sshl_f SelectTD SelectTD" |
|- class="odd"
|- class="odd"
| class="sshl_f" |FACTDOUBLE(4.2)
| class="sshl_f" |8
| class="sshl_f" |
| class="sshl_f" |
|- class="even"
|- class="even"
| class="sshl_f" |FACTDOUBLE(8)
| class="sshl_f" |84
| class="sshl_f" |
| class="sshl_f" |
|}
|}
== See Also ==
*[[Manuals/calci/FACT | FACT]]
==References==
*[http://en.wikipedia.org/wiki/Double_factorial Double Factorial]