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 Tools and Libs > Uncommons Maths > Big Factorial

Big 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.bigFactorial() API.

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

import java.math.BigInteger;

import org.uncommons.maths.Maths;

public class BigFactorialTest {

  /**
   @param args
   */
  public static void main(String[] args) {
    
    int num = 20;
    BigInteger factorial = Maths.bigFactorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
    
    num = 30;
    factorial = Maths.bigFactorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
    
    num = 40;
    factorial = Maths.bigFactorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
    
    num = 50;
    factorial = Maths.bigFactorial(num);
    System.out.println("Factorial of " + num + " is " + factorial);
  }

}
   

It gives the following output,
Factorial of 20 is 2432902008176640000
Factorial of 30 is 265252859812191058636308480000000
Factorial of 40 is 815915283247897734345611269596115894272000000000
Factorial of 50 is 30414093201713378043612608166064768844377641568960512000000000000


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