Introduction

Arrays are structures that allow you to store multiple values in memory using a single name and indexes. Internally, an array contains a fixed number of variables (called elements) of a particular type¹. The elements in an array are always stored in a contiguous block of memory, providing fast and efficient access.

An array can be:

• Single-Dimensional,
• Multidimensional.

Multidimensional arrays can be

• Jagged,
• Rectangular.

Arrays are useful, for instance,

• When you want to store a collection of related values,
• When you do not know in advance how many variables will be needed,
• When you need a large number of variables (say, 10) of the same type,
• When you want to represent matrices (as you can use an array of arrays to represent 2-dimensional objects).