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FACTDOUBLE

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This function calculates the double factorial of the specified number.

FACTDOUBLE(*number*)

The argument can be any non-negative numeric value.

The *number* argument must be a non-negative number. If you provide a number that is not an integer for the *number* argument, the decimal portion of the number is ignored. The double factorial is calculated as follows for even numbers:

n!! = n(n-2)(n-4) ... (4)(2)

The double factorial is calculated as follows for odd numbers:

n!! = n(n-2)(n-4) ... (3)(1)

Accepts numeric data. Returns numeric data.

FACTDOUBLE(E3)

FACTDOUBLE(R3C5)

FACTDOUBLE(6) gives the result 48

This function is available in product version 1.0 or later.

FACT | PRODUCT | Math and Trigonometry Functions