Properties and methods in Array

Properties and methods

Arrays have their own built-in variables and functions, also known as properties and methods. Here are some of the most common ones.

length

An array’s length property stores the number of elements inside the array.

Example

["a", "b", "c", 1, 2, 3].length;

Output

6

concat

An array’s concat method returns a new array that combines the values of two arrays.

Example

["tortilla chips"].concat(["salsa", "queso", "guacamole"]);

Output

["tortilla chips", "salsa", "queso", "guacamole"]

pop

An array’s pop method removes the last element in the array and returns that element’s value.

Example

["Jupiter", "Saturn", "Uranus", "Neptune", "Pluto"].pop();

Output

“Pluto”

push

An array’s push method adds an element to the array and returns the array’s length.

Example

["John", "Kate"].push(8);

Output

3

reverse

Example

["a", "b", "c"].reverse();

Output

["c", "b", "a"]