Random string generator from JavaScript for kids challenge : <p>I want to ask about the random string generator challenge. So, I got this quiz from JavaScript for kids book from no starch press publisher. I'm newbie and very confused about this challenge, can somebody help me?</p>

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<h1>Random string generator</h1>

<p>"Make a random string generator. You’ll need to start with a 
string containing all the letters in the alphabet:
var alphabet = "abcdefghijklmnopqrstuvwxyz";
To pick a random letter from this string, you can 
update the code we used for the random insult generator in 
Chapter 3: Math.floor(Math.random() * alphabet.length). This 
will create a random index into the string. You can then use 
square brackets to get the character at that index.
To create the random string, start with an empty string 
(var randomString = ""). Then, create a while loop that will 
continually add new random letters to this string, as long 
as the string length is less than 6 (or any length you choose). 
You could use the += operator to add a new letter to the end 
of the string. After the loop has finished, log it to the console 
to see your creation!"</p>
