Question

How to calculate large factorial using BigInteger in Java

Answer 1

import java.math.BigInteger;

public class MyClass {
    public static BigInteger factorial(long len) {
        BigInteger result = BigInteger.ONE;
        
        for (int i = 1; i <= len; i++)
            result = result.multiply(new BigInteger(i + ""));
            
        return result;
    }
    public static void main(String args[]) {
        System.out.println("60! = " + factorial(60));
    }
}


/*

run:

60! = 8320987112741390144276341183223364380754172606361245952449277696409600000000000000

*/

 

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