Factorial (org.matheclipse:matheclipse-gpl 3.0.0 API)

java.lang.Object
- de.tilman_neumann.jml.combinatorics.Factorial

```
public class Factorial
extends Object
```
Implementations of the factorial function.

Author:

Tilman Neumann

Constructor Summary

Constructors
Constructor Description

Factorial()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static BigInteger`	`factorial(int n)`	Peter Luschny's swinging prime factorial algorithm, see http://luschny.de/math/factorial/SwingIntro.pdf
`static void`	`main(String[] args)`	Test.
`static BigInteger`	`withStartResult(int n, int start, BigInteger startResult)`	Computes the factorial for non-negative integer arguments applying the simple product rule, but allowing for a previously computed start value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Factorial
```
public Factorial()
```
- Method Detail
  - withStartResult
```
public static BigInteger withStartResult(int n,
                                         int start,
                                         BigInteger startResult)
                                  throws ArithmeticException
```
    Computes the factorial for non-negative integer arguments applying the simple product rule, but allowing for a previously computed start value. Adapted from http://www.jonelo.de by Johann Nepomuk Loefflmann (jonelo@jonelo.de), published under GNU General Public License.
    
    Parameters:
    
    n - Argument
    
    start - Argument of the start result
    
    startResult - Factorial for start
    
    Returns:
    
    n! if n is a non-negative integer
    
    Throws:
    
    ArithmeticException - if n is a negative integer
  - factorial
```
public static BigInteger factorial(int n)
                            throws ArithmeticException
```
    Peter Luschny's swinging prime factorial algorithm, see http://luschny.de/math/factorial/SwingIntro.pdf
    
    Parameters:
    
    n -
    
    Returns:
    
    n!
    
    Throws:
    
    ArithmeticException - if n is a negative integer
  - main
```
public static void main(String[] args)
```
    Test.
    
    Parameters:
    
    args - Ignored.