Java BigInteger Factorial factorial(BigInteger number)

Description

factorial

License

Apache License

Declaration

public static BigInteger factorial(BigInteger number) 

Method Source Code

//package com.java2s;
/*/*from w  w  w .j  ava  2s  .  co m*/
 * This file is part of the PSL software.
 * Copyright 2011-2015 University of Maryland
 * Copyright 2013-2018 The Regents of the University of California
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.math.BigInteger;

public class Main {
    public static BigInteger factorial(BigInteger number) {
        BigInteger result = BigInteger.valueOf(1);

        for (long factor = 2; factor <= number.longValue(); factor++) {
            result = result.multiply(BigInteger.valueOf(factor));
        }

        return result;
    }
}

Related

1. factorial(BigInteger n)
2. factorial(BigInteger n)
3. factorial(BigInteger originValue)