Source Code : Returns the natural logarithm of n!.

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Returns the natural logarithm of n!.

       
import java.io.File;

/* 
 * 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 {


  /**
   * Returns the natural logarithm of n!.
   * <p>
   * <Strong>Preconditions</strong>:
   * <ul>
   * <li> <code>n >= 0</code> (otherwise
   * <code>IllegalArgumentException</code> is thrown)</li>
   * </ul></p>
   * 
   * @param n argument
   * @return <code>n!</code>
   * @throws IllegalArgumentException if preconditions are not met.
   */
  public static double factorialLog(final int n) {
      if (n < 0) {
          throw new IllegalArgumentException("must have n > 0 for n!");
      }
      double logSum = 0;
      for (int i = 2; i <= n; i++) {
          logSum += Math.log((double)i);
      }
      return logSum;
  }

}

   
    
    
    
    
    
    
  

Thank with us