Java script basic algorithm challenges

Hi I am doing the basic algorithm challenges for javascript and I am trying out the code in code pen. It doesn’t work is there. Is there a template that has some html and css and a space to put your javascript code to test it out. Or even a better way to play around with the code?

I suggest you start using your own text editor and have your own setup to get the hang of it. This is what I do using atom:

<meta charset="UTF-8"/>
<title>Algorithm Challenges</title>


// Algorithm Challenge here:
function foo(){
 return 'Hello world';


And open your file in your browser. Hope this helps :slight_smile:

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Chrome devtools snippets is far and away the best way to run just javascript code

Other great options are run code under node or vscode

With no intention to offend even with the extra big words:

Why? Just why in the world? Of all the places you can test algorithms…

I recommend you:

Or if you have Sublime, Atom or VSCode you can install a plugin/package that executes a JS file with NodeJS. For atom there’s Script! (or Run, I don’t remember), for Sublime there’s integrated builds and for VSCode there’s CodeRunner.

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I second the

It’s a great platform to test your JavaScript!

I third… It’s pretty awesome. But…I just installed sublime text a couple days ago and you reminded me to try and see about how to test my code in there… took me all of 5 minutes to set it up :smiley:

I agree with using, though you can use codepen without html and css. console.log will output to the dev console - I’ve done this several times, but is the better environment for pure javascript.

Hi All, I apologizer for the delay in getting back to you. I just wanted to say thankyou I ended up using visual studio code and sublime. The text editors work great and I appreciate your suggestions