The final variable type I’ll introduce in this book is the array. Unlike strings and numbers (which are scalar variables, meaning they can store only a single value at a time), an array can hold multiple, separate pieces of information. An array is therefore like a list of values, each value being a string or a number or even another array.
Arrays are structured as a series of key-value pairs, where one pair is an item or element of that array. For each item in the list, there is a key (or index) associated with it. The resulting structure is not unlike a spreadsheet or database table (Table 2.2).
|Array Example 1: $artists|