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Introduction to JavaScript

Array MethodsArray Methods

So, you can use an array for storing and retrieving data. The retrieving process by [] calls indexing.

But there are different methods for working with an array.

Add element

There are different ways to add an element to an array.

Push

The push() method adds a new value to the end of the array:

Unshift

The unshift() method works like the push() method, but it inserts the value at the beginning of the array.

Indexing

You can append a new value by indexing:

You can use indexing to assign a value to a specified index, reassign a previous value, etc:

To create a new element in the array without mistakes, you need to use the push(value) method or arr[arr.length] = value expression:

Delete element

Sometimes you may need to delete array elements. This can be done in different ways. Now I will describe some of them.

Pop

The pop() method deletes the last element in an array, and you can save it to another variable:

Shift

The shift() method works like the pop() method, but cuts the first element from an array:

1. How to add an element to the end of the array?
2. How to remove the last element in the array?

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How to add an element to the end of the array?

Select a few correct answers

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How to remove the last element in the array?

Select the correct answer

Section 2.

Chapter 7