Calculate Factorial

factorial

The factorial function computes the factorial of a non-negative numeric value recursively.

Function Signature

function factorial(int: Numeric | undefined): number | undefined

Parameters

• int (Numeric | undefined): A numeric input value or numeric string whose factorial should be calculated. Can also be undefined.

Return Value

• number | undefined:
  • The factorial result as a number if the input is valid.
  • undefined if the input is negative, not numeric, non-integer, or undefined.

Example Usage

Notes

• The function uses a recursive approach internally.
• Input is normalized before computation.
• Factorial of 0 and 1 is 1.
• It does not compute factorial for fractions (non-integer values).
• Can return very large values quickly due to the rapid growth rate of factorial values.

Aliases

• getFactorial
• calculateFactorial

See Also

• calculateHCF
• calculateLCM
• getFactors