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 Tools and Libs > Uncommons Maths > Factorial

Factorial 

Uncommons Maths is a java library with nice math utilities and random number generators. This requires the library uncommons-maths-1.2.2.jar to be in classpath. The following example shows using Maths.factorial() API. It lets us to calculate the factorial in the range 0 - 20.

File Name  :  
com/bethecoder/tutorials/uncommons/FactorialTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.uncommons;

import org.uncommons.maths.Maths;

public class FactorialTest {

  /**
   @param args
   */
  public static void main(String[] args) {
    
    int num = 5;
    long factorial = Maths.factorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
    
    num = 10;
    factorial = Maths.factorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
    
    num = 15;
    factorial = Maths.factorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
  }

}
   

It gives the following output,
Factorial of 5 is 120
Factorial of 10 is 3628800
Factorial of 15 is 1307674368000


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