Can you people please say how a for loop works in multi dimensional arrays? ex: matrix multiplication /sorting 2 string arays usin compareTo() method

int[3][4] matrix = new int[3][4];

fillMatrix(matrix);

for(int i =0; i < matrix.length; ++i) {

    for(int j =0; j < matrix[i].length; ++j)  {

        // access matrix[i][j] and do something

    }

}

Your example is not clear. However, nested for-loops are what is used for multidimensional arrays, which are called matrices once they're above1 dimension.