Two-dimensional arrays

Two-dimensional arrays were presented briefly in Chapter 2, Getting Started with Go for Data Structures and Algorithms. To recap, for dynamic allocation, we use slice of slices, which is a two-dimensional array. A two-dimensional array, is a list of single-dimensional arrays. Every element in a two-dimensional array arr, is identified as arr[i][j], where arr is the name of the array and i and j represent rows and columns, and their values ranging from 0 to m and 0 to n, respectively. Traversing a two-dimensional array is of O(m*n) complexity.

The following code shows how to initialize an array:

var arr = [4][5] int{
    {4,5,7,8,9},
    {1,2,4,5,6},
    {9,10,11,12,14},
    {3,5,6,8,9}
}

An element in a two-dimensional array is accessed with a row index and column index. In the following example, the array's value in row 2 and column 3 is retrieved as an...