With indexed arrays, things start getting more interesting. Here we’ll focus on 1D and 2D subarrays, as 3D subarrays are rarely used in practice.

Let's first start with assigning values to slices. The general syntax looks like this: slice = values, where slice is a slice of a certain array and values are the values to be assigned.

Possible formats of values:

• a single scalar (number);
• a 1D array of the same size as the slice (if it is 1D); or the size of the second dimension (if the slice is 2D);
• a 2D array of the same shape as a 2D slice.

Here is an example to clarify all of this:

Let’s now visualize it:

When we assign a scalar to a 1D slice, this scalar is assigned to every element of the slice. When a 1D array is assigned to a 2D slice, this 1D array is assigned to every 1D array in the slice. Assigning a scalar to a 2D slice works the same as with a 1D slice.

Assigning values to integer array indexed subarrays works the same way as with slices. Assigning values to boolean indexed subarrays works the same way as with 1D slices.