Returns the double factorial of a number (i.e. number!!). Double factorial of zero returns 1 by definition.
For even numbers, FACTDOUBLE(number) returns: 2*4*6*8* ... *number
For odd numbers, FACTDOUBLE(number) returns: 1*3*5*7* ... *number
Syntax
Remarks
The decimal points (if any) are truncated before calculating the double factorial of the given number.
Examples
|
Formula |
Result |
|
=FACTDOUBLE(4.6) |
8 |
|
=FACTDOUBLE(10) |
3840 |
|
=FACTDOUBLE(0) |
1 |
Possible Errors
|
Errors |
Meaning |
|
#N/A! |
|
|
#NAME! |
|
|
#VALUE! |
|
|
#REF! |
|
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