Java Square Calculate squareOfSumFirstN(long n)

Description

square Of Sum First N

License

Apache License

Declaration

public static long squareOfSumFirstN(long n) 

Method Source Code

//package com.java2s;
/**//from   w  w w . ja v a  2  s.  c  om
 *
 * maer - Solutions to problems of Project Euler
 * Copyright (C) 2011, Sandeep Gupta
 * http://www.sangupta.com/projects/maer
 *
 * The file is licensed under the 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 {
    public static long squareOfSumFirstN(long n) {
        long sumN = sumFirstN(n);
        return sumN * sumN;
    }

    public static long sumFirstN(long n) {
        return (n * (n + 1)) / 2;
    }
}

Related

1. squaredError(double[] vector1, double[] vector2)
2. squaredLoss(double[] x, double[] y, double w_0, double w_1)
3. squaredNorm(final double[] vec)
4. squareEntries(double[][] m)
5. squarenessRatio(final double w, final double h)
6. squareRoot(Number num)
7. squareSign(double value)
8. squareSum(double... doubles)