Difference between revisions of "Documentation/How Tos/Calc: FACTDOUBLE function"
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<tt>'''FACTDOUBLE(0)'''</tt> | <tt>'''FACTDOUBLE(0)'''</tt> | ||
: returns <tt>'''1'''</tt>. | : returns <tt>'''1'''</tt>. | ||
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| + | === Issues: === | ||
| + | * This function currently appears in the AddIn category of the Function Wizard. | ||
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* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] | * [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]] | ||
* [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} | * [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}} | ||
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Revision as of 10:22, 2 March 2009
FACTDOUBLE
Returns the double factorial of a number.
This function is only available if the Analysis AddIn is installed.
Syntax:
FACTDOUBLE(number)
- returns number!!, the double factorial of number, where number is an integer greater than or equal to zero.
- For even numbers FACTDOUBLE(number) returns:
- 2*4*6*8* ... *number
- For odd numbers FACTDOUBLE(number) returns:
- 1*3*5*7* ... *number
- FACTDOUBLE(0) returns 1 by definition.
Example:
FACTDOUBLE(5)
- returns 15.
FACTDOUBLE(6)
- returns 48.
FACTDOUBLE(0)
- returns 1.
Issues:
- This function currently appears in the AddIn category of the Function Wizard.
