Factorial
Purpose 
Returns the factorial of number stopping at 1 or stopping at the optional numberOfFactors.
Format 
Factorial(number{;numberOfFactors})
Parameters 
number - numeric expression or field containing a positive integer.
numberOfFactors - any numeric expression or field containing a number that represents how many factors to include in the multiplication.
Parameters in curly braces { } are optional.
Data type returned 
number
Originated in 
FileMaker Pro 7.0
Description 
This function is useful in statistics and combinatorics.
Where n = number and i = numberOfFactors:
Equation
Equation
Examples 
Factorial(3) returns 6, which = 3 * 2 * 1.
Factorial(10;3) returns 720, which = 10 * 9 * 8.
Related topics 
Functions reference (category list)
Functions reference (alphabetical list)
About formulas
About functions
Defining calculation fields
Using operators in formulas
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