2. After pressing Enter, you can see that a two-dimensional array with 2 rows and 3 columns has been created.
3. Enter1(3,4) in the command line window, as shown in the following figure.
4. After pressing Enter, you can see that an array with 3 rows and 4 columns has been created, as shown in the figure below.
5.zeros function creates an array of all 0s with a certain size, and ones function creates an array of all 1 with a certain size, which can be predefined. All 0s and all 1 are equivalent to an empty array. After definition, you can assign a value to the array and select it as needed.