dotproduct.groovy

public class dotproduct {
    public static void main(String[] args) {
        int[][] matrix1 = {
            {1, 2, 3},
            {4, 5, 6},
            {7, 8, 9}
        };

        int[][] matrix2 = {
            {10, 11, 12},
            {13, 14, 15},
            {16, 17, 18}
        };

        int dotProduct = calculateDotProduct(matrix1, matrix2);
        System.out.println("Dot Product: " + dotProduct);
    }

    public static int calculateDotProduct(int[][] matrix1, int[][] matrix2) {
        int rows1 = matrix1.length;
        int cols1 = matrix1[0].length;
        int cols2 = matrix2[0].length;

        if (cols1 != matrix2.length) {
            throw new IllegalArgumentException("Number of columns in matrix1 must match the number of rows in matrix2");
        }

        int dotProduct = 0;
        for (int i = 0; i < rows1; i++) {
            for (int j = 0; j < cols2; j++) {
                int sum = 0;
                for (int k = 0; k < cols1; k++) {
                    sum += matrix1[i][k] * matrix2[k][j];
                }
                dotProduct += sum;
            }
        }

        return dotProduct;
    }
}