Uncaught ReferenceError: $ is not defined (javascript)

Question

I executed my code and and it displayed the error " Uncaught ReferenceError: $ is not defined" in line 7. This is the entire code on line 7
""------ $("next").click(function(){
if(animating) return false;
animating = true; ------""

is there anything wrong. help needed. you can find it here

https://code.sololearn.com/WEN9i555M8Ql/#html

Answer 1

<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>

Add this inside head tag

Answer 2

Thanks Kartikey Sahu. I've got a little problem. The slide is not working to.. If you save and execute it in a normal browser it works fine but it doesn't run properly on sololearn