8.2 Arrays

By the end of this section you should be able to

• 8.2.1 Declare and use 1D and 2D arrays
• 8.2.2 Use variables as array indexes
• 8.2.3 Read and write array values using iteration, including nested loops

Lessons

1. One-dimensional arrays
2. Arrays and loops
3. Two-dimensional arrays
4. Arrays in practice

Key vocabulary

Array

A fixed-length data structure holding items of the same data type.

Index

The number that identifies the position of an element in an array.

Element

A single item stored in an array.

1D array

An array that is a single list of elements.

2D array

An array arranged as rows and columns, accessed with two indexes.

Nested iteration

A loop inside another loop, used to work through a 2D array.