This page demistrates JavaScript Arrays as well as some of their usese. Arrays are a very useful tool when it comes to programming.

Property (arrayName.) Description
length Is used to set or return the length of an Array. (physical size)
prototype Lets you add properties and/or methods to an Array.
Method (arrayName.) Description
concat() Joins two or more Arrays together and returns a single array containing both.
indexOf() Looks though the Array for a specific value, then returns the index position of that value.
join() Places all elements of an Array into a String.
lastIndexOf() Starts at the end of an Array searching for a specific value and returns the index position of that vlaue.
pop() Deletes the last index of an Array and returns that value.
push() Adds another value to the end of an Array and returns the new length of the Array.
reverse() Reverses the order of an Array.
shift() Removes the first element of an Array and returns it.
slice() Takes a piece (slice) of an Array and returns it as new Array.
sort() Puts the values in an Array in order.
splice() Allows you to Add/Remove specific indexes from an Array.
toString() Converts an Array into a String and returns the results
unshift() Adds new infomation to the front of the Array and returns the new length of the Array.
valueOf() Returns the primitive value (such as an integer) of an Array.
Code Output
code

Example: Declaring and Printing Arrays


code

Example: Adding Values in Arrays