• Explain at least three uses for multi-dimensional arrays.
• What does it mean when we say a multi-dimensional array is an array of arrays? Explain in detail and give an example.

• Multidimensional array are crucial in organizing data which is in subgroups to be within an array. With these multidimensional arrays, data becomes well organized in elements of an array.
• Multidimensional array help to store data in form of matrixes. For example a train timetable or schedule which is not possible to store it as a single dimensional array.
• It is also used to replace the work of a spreadsheet. The data is arranged into columns and rows in an array which is similar to spreadsheet.

Multi-dimensional array is an array of arrays because it is one array which contains more than one array. For example a two dimensional array is array of arrays because we need two indices to select an element. Looking at three dimensional array is an array of arrays because we need three indices to select an element. The table below shows an example of data to form a two dimensional array;

The data in the table can be represented in a two-dimensional array, like below:

$cars=array

(

array (“Mercedes”, 21, 19),

array (“Toyota”, 13, 11),

array (“Nissan”, 4, 1)

array (“Land Rover”, 19, 14)

);