Question

How to calculate dot product of two arrays in Java

Answer 1

public class CalculateDotProductOfTwoArrays_Java {
    private static int calculate_dot_product(int[] arr1, int[] arr2) {
        int product = 0;
        int size = arr1.length;
 
        for (int i = 0; i < size; i++) {
            product += arr1[i] * arr2[i];
        }
 
        return product;
    }
    public static void main(String args[]) {
        int[] arr1 = {1, 4, 8, 9, 6};
        int[] arr2 = {0, 7, 1, 3, 40};
         
        System.out.printf("Dot product = %d", calculate_dot_product(arr1, arr2));
    }
}

 
 
/*
run:
   
Dot product = 303
   
*/

 

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