setting Array length

try to make the code more presentable before and after the block of code on separate lines apply this key 3x ( ` ) . Refer to the Markdown cheatsheet on the bottom-right side of the post text-area.

With array's in JavaScript, you can get an element by using the index number of the element. You got that correct in the first task by changing myArray[3] to myArray[2];

In the second task it is asking you to set the 31st element to treehouse. Well accessing that element we would use myArray[30]. We can also set a value for a particular index by using myArray[30] = 'treehouse';

So your final result would look like:

var myArray = ["sugar", "rush", "fix", "it", 3.14, 42];
var thirdElementInArray = myArray[2];
myArray[30] = 'treehouse';

I dont agree with that. Here is Oxford dictionary Definition of simultaneously in English: simultaneously Line breaks: sim¦ul|tan¦eous¦ly Pronunciation: /?s?ml?te?n??sli / ADVERB

At the same time: the telethon was broadcast simultaneously on 31 US networks it works simultaneously as character study, teen drama and sci-fi thriller

It is very important for flow of the code, particularly in the context of algorithm.

For clarity the task for the challenge is: "On about line 18, set the 31st element in 'myArray' to the word 'treehouse'.

myArray is already set on line 16, so if you declare it again (by putting 'var' in front of it) it wipes out the existing values.

The correct line 18 is (as Gareth posted above):

myArray[30] = 'treehouse';

This finds index 30 (the 31 item in the array) and sets it to the string 'treehouse'.