Math & Trig
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=FACTDOUBLE()
Returns the double factorial of a number.
Applies To:
Excel for Microsoft 365Excel for Microsoft 365 for MacExcel 2024Excel 2024 for MacExcel 2021Excel 2021 for MacExcel 2019Excel 2016
=FACTDOUBLE(number)
Hover argument names in the table for details.
Output typeNumber
Popularity29 / 100
VolatileNo
Dynamic ArrayNo
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◧ Arguments
| Argument | Type | Required | Description |
|---|---|---|---|
number |
Number | Required | The value for which to return the double factorial. If number is not an integer, it is truncated. |
▣ Examples
Double factorial of 6. For 6, an even number, the double factorial is equivalent to 6*4*2; using this equation: n!! = n*(n-2)*(n-4)...(4)(2)
=FACTDOUBLE(6)
Result:
48
Double factorial of 7. For 7, an odd number, the double factorial is equivalent to 7*5*3; using this equation: n!! = n*(n-2)*(n-4)...(3)(1)
=FACTDOUBLE(7)
Result:
105
§ Remarks
- If number is nonnumeric, FACTDOUBLE returns the #VALUE! error value.
- If number is negative, FACTDOUBLE returns the #NUM! error value.
- If number is even:
- If number is odd:
✦ Tips
- If number is even:
- If number is odd:
⚠ Common Errors
#VALUE!
If number is nonnumeric, FACTDOUBLE returns the #VALUE! error value.
Fix: برای number مقدار عددی وارد کنید.
#NUM!
If number is negative, FACTDOUBLE returns the #NUM! error value.
Fix: A non-negative number
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