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

Related Videos

FACTDOUBLE

See Also

References