Index and slice a 2D array

Now that you're familiar with how to create a 2D array, let's practice indexing and slicing 2D arrays to return specific elements.

Remember that we use the square bracket notation to index a 2D array, like so:

my_array[row, column]

We can also use getindex to index into an array, by passing the array, the row, and the column into the function.

To select an entire row or an entire column, use the colon : operator.