Manuals/calci/FACTDOUBLE
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FACTDOUBLE(Number)
- is a positive integer whose double factorial is to be found.
- FACTDOUBLE(), returns the double factorial of a number.
Description
FACTDOUBLE(Number)
e.g. FACTDOUBLE(6) displays 48 as a result.
- should be a positive integer.
- The factorial of an even number is calculated as -
- The factorial of an odd number is calculated as -
- If is negative, Calci displays #N/A error message.
- If is not an integer, it is truncated to calculate the double factorial.
- If 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.
Examples
Function | Output |
FACTDOUBLE(7) | 105 |
FACTDOUBLE(0) | 1 |
FACTDOUBLE(4.2) | 8 |
FACTDOUBLE(8) | 384 |
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