How to sum a row in a matrix

Question

Write the method:

public int sumRow(int[][] matrix, int row)

that sums row row in the 2D array called matrix.

Given:

Answer 1

You need to reference the second dimension of the array for j.

//ex: first dimension is matrix.length
//second dimension is matrix[any index in the first dimension].length
//and this cycle would continue with more and more [num] on the end

public int sumRow(int[][] matrix, int row)
{
    int sum = 0;
    for(int i = 0; i < matrix.length; i++)
    {
        for(int j = 0; j < matrix**[0]**.length; j++)
        {
            sum = sum + matrix[j][i];
        }   
    }
    return sum;
}