Here you can find the source of dotProduct(int[] xs, int[] ys)
public static int dotProduct(int[] xs, int[] ys)
//package com.java2s; /*/*from w ww . j a v a2s .c o m*/ * * * Copyright 2015 Skymind,Inc. * * * * 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. * * */ public class Main { public static int dotProduct(int[] xs, int[] ys) { int result = 0; int n = xs.length; if (ys.length != n) throw new IllegalArgumentException("Different array sizes"); for (int i = 0; i < n; i++) { result += xs[i] * ys[i]; } return result; } }