Factorial class - factorial library

Factorial class

A utility class for calculating various types of factorials.

This class provides static methods to compute standard factorial (n!), double factorial (n!!), rising factorial (Pochhammer symbol), and falling factorial for non-negative integer inputs.

Due to the rapid growth of factorial values, all methods return BigInt to prevent overflow.

Constructors

Factorial()

Properties

hashCode → int: The hash code for this object.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

calculate(int n) → BigInt: Calculates the factorial of a non-negative integer n using an iterative approach.
calculateDouble(int n) → BigInt: Calculates the double factorial (n!!) of an integer n using an iterative approach.
calculateFalling(int x, int n) → BigInt: Calculates the falling factorial of x to the power of n.
calculateRising(int x, int n) → BigInt: Calculates the rising factorial (Pochhammer symbol) of x to the power of n.