Description
factorial
License
Apache License
Parameter
| Parameter | Description |
|---|
| n | Argument. |
Exception
| Parameter | Description |
|---|
| IllegalArgumentException | if the result is too large to be representedby a long (i.e. if n > 20). |
Return
n!
Declaration
public static long factorial(int n)
Method Source Code
//package com.java2s;
/*/*from ww w. ja v a 2 s. c o m*/
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
public class Main {
/** All long-representable factorials. */
private static final long[] FACTORIALS = new long[] { 1L, 1L, 2L, 6L, 24L, 120L, 720L, 5040L, 40320L, 362880L,
3628800L, 39916800L, 479001600L, 6227020800L, 87178291200L, 1307674368000L, 20922789888000L,
355687428096000L, 6402373705728000L, 121645100408832000L, 2432902008176640000L };
/**
* @param n Argument.
* @return {@code n!}
* @throws IllegalArgumentException if the result is too large to be represented
* by a {@code long} (i.e. if {@code n > 20}).
*/
public static long factorial(int n) {
return FACTORIALS[n];
}
}
Related
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int n)
- factorial(int number)