CHAPTER 49C — Two-Dimensional Arrays

Often data comes naturally in a two dimensional form. For example, maps are two dimensional (or more), the layout of a printed page is two dimensional, a computer-generated image (such as on your computer screen) is two dimensional, and so on.

For these situations you need a two-dimensional array. This can be thought of as a collection of "slots" laid out in a 2D grid. Each slot can hold a value (as with a 1D array). However, now two indexes are needed to specify a slot.

Chapter Topics:

• Two-dimensional Arrays.
• 2D Array Declaration.
• Initializer Lists.
• Differing Numbers of Elements in each Row.
• 2D Arrays as Arrays of 1D Arrays.
• Printing a 2D Array.

If you have ever used a spreadsheet application then you already have used a 2D grid for holding and manipulating data.