What Is an Array?
An array is a way to store a collection of multiple items under a single variable name. This section introduces how to create, delete and access array elements. Think about the following as you read the article:
- How are array elements accessed?
- What methods are used to access the elements of an array?
- How would you convert a string into an array?
Creating arrays
Arrays consist of square brackets and items that are separated by commas.
- Suppose we want to store a shopping list in an array. Paste the following code into the console:
- In the above example, each item is a string, but in an array we
can store various data types - strings, numbers, objects, and even other
arrays. We can also mix data types in a single array - we do not have
to limit ourselves to storing only numbers in one array, and in another
only strings. For example:
const sequence = [1, 1, 2, 3, 5, 8, 13]; const random = ["tree", 795, [0, 1, 2]];
- Before proceeding, create a few example arrays.
const shopping = ["bread", "milk", "cheese", "hummus", "noodles"]; console.log(shopping);